{"data":{"slug":"soundcore-liberty-4-pro","type":"earbuds","brand":"soundcore","name":"Liberty 4 Pro","aliases":["Anker Soundcore Liberty 4 Pro","A3954"],"release_date":"2024-10","url":"https://arkivo.dev/earbuds/soundcore-liberty-4-pro","specs":{"series":null,"model_numbers":["A3954","A3954ZF1","A3954Z21","A3954ZG1"],"gtins":["194644297237","194644297206","194644207434"],"announce_date":null,"status":"available","predecessor":null,"successor":"soundcore-liberty-5-pro","launch_price_usd":129.99,"launch_price_eur":null,"markets":["US","GB","EU","JP"],"colors":["Glossy Black","Pearl White","Blue"],"manufacturer_url":"https://us.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds","spec_sheet_url":null,"manual_url":"https://salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdf","eprel_registration_number":null,"warranty_years":1.5,"segment":"music","form_factor":"in_ear","bud_shape":"stem","single_bud_use":"either","rgb_lighting":null,"drivers":[{"type":"dynamic","role":"woofer","size_mm":10.5,"count":1},{"type":"dynamic","role":"tweeter","size_mm":4.6,"count":1}],"driver_type":"dynamic","driver_size_mm":10.5,"drivers_per_side":2,"driver_diaphragm_material":"Titanium-coated (tweeter)","frequency_response_hz":{"min_hz":14,"max_hz":40000},"impedance_ohm":null,"sensitivity_db":null,"sensitivity_reference":null,"max_sample_rate_khz":null,"max_bit_depth_bits":null,"adaptive_eq":null,"sound_personalization":true,"onboard_eq":null,"eq_bands":8,"eq_presets":null,"volume_limit_db":null,"virtual_surround":["Spatial Audio (Music, Podcast, Movie and Game modes)"],"head_tracking":true,"anc":true,"anc_type":null,"anc_mic_count":6,"anc_adaptive":true,"anc_levels":5,"anc_claimed_attenuation_db":null,"transparency_mode":true,"transparency_adjustable":true,"adaptive_audio_mode":null,"conversation_detection":true,"wind_noise_reduction":true,"measured_frequency_response_notes":"SoundGuys found the default sound follows its headphone preference curve closely across the mids and highs, with more emphasis on bass below 200 Hz.","measured_bass_amount_db":null,"measured_treble_amount_db":null,"measured_target_deviation_db":null,"measured_response_consistency_db":null,"measured_thd_pct":null,"measured_leakage_db_spl":null,"measured_noise_isolation":null,"measured_attenuation_overall_db":null,"measured_attenuation_passive_db":null,"measured_microphone_notes":"SoundGuys found voices clear in its ideal-conditions demo. In simulated office and street noise some background noise gets through while the voice stays in focus. Simulated wind and reverberant space were handled well. These are qualitative results.","measured_microphone_lfe_hz":null,"measured_microphone_hfe_hz":null,"measured_microphone_noise_handling_db":null,"measured_latency":null,"measured_latency_bluetooth_ms":null,"measured_latency_2_4ghz_ms":null,"measured_latency_game_mode_ms":null,"measured_battery_life":[{"anc":true,"codec":null,"hours":5.7}],"measured_battery_life_h":5.7,"measured_battery_life_with_case_h":null,"measured_charge_time_min":null,"measured_weight_g":null,"microphone_count":6,"microphone_count_total":6,"voice_pickup_sensor":null,"microphone_noise_reduction":"ai","voice_call_bandwidth":null,"mute_button":null,"sidetone":null,"chipset":null,"connection_types":["bluetooth"],"bluetooth_version":"5.3","bluetooth_codecs":["SBC","AAC","LDAC"],"bluetooth_profiles":null,"bluetooth_le_audio":null,"auracast":null,"multipoint":true,"multipoint_device_count":2,"multipoint_ldac":false,"paired_device_memory":null,"automatic_device_switching":null,"fast_pair":["google_fast_pair"],"audio_sharing":null,"wireless_range_m":10,"wireless_receiver":null,"receiver_connector":null,"simultaneous_2_4ghz_bluetooth":null,"low_latency_mode":null,"latency_claimed":null,"latency_claimed_min_ms":null,"compatible_platforms":["android","ios","windows","macos"],"platform_connections":null,"feature_requirements":[{"feature":"LDAC","requirement":"Android 8.0 or later, enabled as Preferred audio quality in the soundcore app. Not available while connected to two devices. Spatial Audio is off while LDAC is on. LDAC raises power use and shortens playtime."},{"feature":"Google Fast Pair","requirement":"Android 6.0 or later."},{"feature":"Head tracking","requirement":"Spatial Audio Music mode set to head tracking in the soundcore app. Fixed mode has no head tracking."},{"feature":"Easy Chat","requirement":"Enable in the soundcore app. Available only in ANC mode."},{"feature":"Touch bar menu","requirement":"The case menu shows only Ambient Sound by default. Add Spatial Audio, Atmospheric, Find Device and Remote Camera in the soundcore app."}],"official_license":null,"battery_capacity_mah":56,"battery_user_replaceable":null,"battery_life_claimed":[{"mode":"anc_off","codec":null,"spatial_audio":null,"with_case":false,"hours":10},{"mode":"anc_off","codec":null,"spatial_audio":null,"with_case":true,"hours":40},{"mode":"anc_on","codec":null,"spatial_audio":null,"with_case":false,"hours":7.5},{"mode":"anc_on","codec":null,"spatial_audio":null,"with_case":true,"hours":30},{"mode":"transparency","codec":null,"spatial_audio":null,"with_case":false,"hours":7.5},{"mode":"transparency","codec":null,"spatial_audio":null,"with_case":true,"hours":30},{"mode":"call","codec":null,"spatial_audio":null,"with_case":false,"hours":4.5}],"battery_life_max_h":10,"battery_life_anc_on_h":7.5,"battery_life_anc_off_h":10,"battery_life_with_case_h":40,"battery_life_with_case_anc_on_h":30,"talk_time_h":4.5,"charge_time_0_100_min":40,"charging_notes":"The manual gives up to 40 minutes for the earbuds. An empty case takes 2.5 hours by cable and 3.5 hours wirelessly. Case input is 5 V 1 A. The case stops charging the earbuds when its battery drops below 20 percent. Dry the earbuds and the USB-C port before charging.","quick_charge_min":5,"quick_charge_playback_h":4,"case_battery_capacity_mah":580,"case_battery_user_replaceable":null,"charging_port":"usb_c","case_charge_time_min":150,"wireless_charging":true,"wireless_charging_standards":null,"wireless_charging_max_w":null,"case_speaker":true,"case_screen":true,"case_audio_transmitter":null,"control_types":["pressure","swipe"],"volume_control":"swipe","gesture_controls":["Squeeze once on either earbud: play or pause, or answer a call","Squeeze twice on the right earbud: next track","Squeeze twice on the left earbud: previous track","Tap and hold either earbud for 2 seconds: switch between ANC and transparency, or reject or end a call","Slide up on either earbud: volume up","Slide down on either earbud: volume down","Pinch both earbud stems for 3 seconds: pair a second device"],"customizable_controls":true,"voice_assistant":null,"wear_detection":true,"sensors":["Barometric pressure sensor"],"heart_rate_sensor":null,"skin_temperature":null,"hearing_aid_feature":null,"medical_clearances":null,"hearing_test":true,"loud_sound_reduction":null,"health_features":null,"ear_tip_sizes":["XXS","XS","S","M","L","XL"],"ear_tip_materials":null,"stabilizers":null,"fit_test":true,"ip_rating":["IP55"],"case_ip_rating":null,"water_resistance_depth_m":null,"companion_app":"soundcore","companion_app_platforms":["android","ios"],"firmware_updatable":true,"find_my_networks":null,"precision_finding":null,"live_translation":null,"weight_g":5.5,"dimensions_mm":null,"case_weight_g":51,"case_dimensions_mm":{"width_mm":62,"height_mm":29.6,"depth_mm":65},"hi_res_audio":["hi_res_audio_wireless"],"communication_certifications":null,"fcc_ids":["2AOKB-A3954","2AOKB-A3954L","2AOKB-A3954R"],"other_certifications":null,"in_the_box":["Earbuds","Charging case","Ear tips in six sizes (XXS, XS, S, M, L, XL), size M pre-installed","USB-C charging cable"],"cables_included":null},"variants":[{"model_number":"A3954ZF1","gtin":"194644297237","markets":["US"],"colors":["Glossy Black"]},{"model_number":"A3954Z21","gtin":"194644297206","markets":["US"],"colors":["Pearl White"]},{"model_number":"A3954ZG1","gtin":"194644207434","markets":["US"],"colors":["Blue"]}],"sources":[{"url":"https://salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdf","kind":"manual","accessed":"2026-10-20","fields":["manual_url","drivers","driver_type","frequency_response_hz","bluetooth_version","wireless_range_m","connection_types","battery_capacity_mah","case_battery_capacity_mah","charge_time_0_100_min","case_charge_time_min","quick_charge_min","quick_charge_playback_h","charging_notes","charging_port","wireless_charging","ip_rating","ear_tip_sizes","fit_test","fast_pair","multipoint","multipoint_ldac","single_bud_use","control_types","volume_control","gesture_controls","customizable_controls","wear_detection","conversation_detection","head_tracking","virtual_surround","anc_adaptive","anc_levels","transparency_mode","transparency_adjustable","companion_app","companion_app_platforms","firmware_updatable","case_screen","case_speaker","battery_life_claimed","feature_requirements"],"notes":{"manual_url":"English user guide A3954, published in the service index on 2025-09-01.","drivers":"SPECS table lists 10.5mm and 4.6mm dynamic drivers. The US page calls the second a titanium-coated tweeter and Anker Japan names the 10.5 mm driver for bass and the 4.6 mm driver for mid and high range. One of each per earbud.","frequency_response_hz":"SPECS table prints 14Hz - 40kHz with no codec or conditions.","battery_capacity_mah":"SPECS table lists Earbuds 56mAh x 2 and Charging Case 580mAh. Stored per earbud. Typical or rated is not stated.","case_battery_capacity_mah":"SPECS table lists Charging Case 580mAh. Typical or rated is not stated.","charge_time_0_100_min":"SPECS table says charging time for earbuds up to 40 minutes. SoundGuys lists 45 minutes.","case_charge_time_min":"Charging section says recharging the case with the earbuds removed takes 2.5 hours by cable and 3.5 hours by wireless charging.","quick_charge_playback_h":"Charging section says a 5-minute charge of the earbuds gives 4 hours of playtime. ANC, volume and codec are not stated.","wireless_charging":"Charging section says to place the case at the centre of a wireless charger. No standard is named.","ip_rating":"SPECS table lists IP55 for the earbuds. SoundGuys and press list IPX5. Anker Japan says the case is not rated.","multipoint_ldac":"LDAC section says that with two devices connected the app warns that LDAC is not supported. The Anker Japan comparison table says LDAC can be used with multipoint. The manual is kept.","anc_adaptive":"Ambient Sound section: ANC levels 6 to 10 adapt to the ears and environment.","anc_levels":"ANC is level 6 to 10, so 5 levels. Transparency is level 1 to 5. Normal sits between them.","head_tracking":"Spatial Audio Music Mode offers head tracking or fixed. Podcast, Movie and Game modes are listed without head tracking.","virtual_surround":"Four Spatial Audio modes: Music, Podcast, Movie and Game. Spatial Audio is not supported when LDAC is on.","conversation_detection":"Easy Chat lowers music volume and enables transparency while you talk, then returns to the ANC level after 5, 10 or 15 seconds of silence. ANC mode only.","case_speaker":"Reset section says a notification sound plays from the charging case. SoundGuys says the app can play a tone from either the earbuds or the case.","case_screen":"Smart Display on the charging case with a touch bar.","gesture_controls":"Controls table for dual earbuds. Squeeze controls can be customised in the app. Using a single earbud, squeeze twice plays the next track and there is no previous-track gesture.","battery_life_claimed":"SPECS table: ANC off up to 10 h and 40 h with case, ANC on up to 7.5 h and 30 h. Anker FAQ test was at default settings, normal mode and 50 percent volume. LDAC increases power use and reduces playtime.","transparency_adjustable":"Transparency is level 1 to 5 on the slider and in the app."}},{"url":"https://service.soundcore.com/article-description/Different-Playtimes-of-soundcore-Liberty-4-Pro-from-a-Single-Charge-With-the-Charging-Case","kind":"manufacturer_page","accessed":"2026-10-20","fields":["battery_life_claimed"],"notes":{"battery_life_claimed":"Maker FAQ: ANC 7.5 h and 30 h with case, normal 10 h and 40 h, transparency 7.5 h and 30 h. Calls 4 h with ANC, 4.5 h in normal mode and 4 h with transparency. The call row stores the normal-mode 4.5 h. Tested in the Anker laboratory at default settings, normal mode and 50 percent volume."}},{"url":"https://us.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds","kind":"manufacturer_page","accessed":"2026-10-20","fields":["manufacturer_url","anc","wind_noise_reduction","microphone_count","microphone_noise_reduction","segment","form_factor","bud_shape","driver_diaphragm_material"],"notes":{"anc":"Seven sensors and real-time adaptive noise reduction that adapts every 0.3 seconds.","wind_noise_reduction":"Six microphones, a noise cancelling algorithm and wind noise reduction technology for calls.","microphone_count":"6-Mic AI Clear Calls.","bud_shape":"Stemmed earbuds with a control area on the stem.","driver_diaphragm_material":"US page names a titanium-coated tweeter next to the 10.5mm driver. Only the tweeter coating is stated."}},{"url":"https://us.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds.js","kind":"manufacturer_page","accessed":"2026-10-20","fields":["status","markets","model_numbers","gtins","colors","variants"],"notes":{"colors":"US store lists Glossy Black, Pearl White and BIue, with a typo in the last name. Stored as Blue. Anker Japan sells Midnight Black, Pearl White, Sky Blue and Deep Green under other SKUs, and the EU store lists more colours.","gtins":"US store barcodes per colour. The EU store uses the same barcodes for its own SKU names.","variants":"US colour SKUs A3954ZF1 Glossy Black, A3954Z21 Pearl White and A3954ZG1 Blue.","status":"The US store lists all three colours as available on the access date.","markets":"Also sold through the UK, EU and Japan stores of the maker."}},{"url":"https://www.ankerjapan.com/products/a3954","kind":"manufacturer_page","accessed":"2026-10-20","fields":["bluetooth_codecs","microphone_count_total","multipoint_device_count","sensors"],"notes":{"bluetooth_codecs":"Comparison table lists SBC / AAC / LDAC.","multipoint_device_count":"Multipoint connects to two devices at the same time.","sensors":"Seven sensors for ANC, with a new barometric pressure sensor that works when Airplane Mode is turned on in the soundcore app.","microphone_count_total":"Six microphones are used for call noise removal and the seven sensors for ANC include a new barometric sensor, so six microphones in total."}},{"url":"https://lp.ankerjapan.com/hubfs/aoos/manual/A3954QSG.pdf","kind":"manual","accessed":"2026-10-20","fields":["fcc_ids"],"notes":{"fcc_ids":"Quick Start Guide prints FCC ID 2AOKB-A3954 for the model A3954 and 2AOKB-A3954L and 2AOKB-A3954R for the left and right earbuds."}},{"url":"https://www.soundguys.com/anker-soundcore-liberty-4-pro-review-125410/","kind":"measurement","accessed":"2026-10-20","fields":["release_date","launch_price_usd","weight_g","eq_bands","sound_personalization","hearing_test","compatible_platforms","case_speaker","measured_battery_life","measured_frequency_response_notes","measured_microphone_notes"],"notes":{"case_speaker":"The Find Device section of the app plays a loud tone from either the earbuds or the charging case.","release_date":"Spec box says product release date October 2024. Anker Japan began sales on 2024-10-03 and the Ukrainian outlet Mezha reported the earbuds on Anker's site on 2024-10-07.","launch_price_usd":"Spec box price $129.99. Digital Trends and Mezha also report $130 and $129 at launch. The maker's US store now lists $149.99.","weight_g":"Spec box lists earbud 5.5 g and case 51 g. It does not say whether weighed by SoundGuys. Amazon US lists 62 g in total, which matches 2 x 5.5 g plus 51 g.","eq_bands":"Eight-band custom equalizer in the soundcore app. The app also has 22 presets.","hearing_test":"HearID Sound Test creates an EQ preset for hearing differences. It is consumer sound personalization, not a medical test.","compatible_platforms":"Reviewer used the earbuds with an iPhone 15 Pro, notes LDAC needs a compatible Android phone and lists computer audio setup in the maker FAQ.","measured_battery_life":"5 h 42 min with ANC enabled, stored as 5.7 h. One-week test of a maker-provided unit on earbud firmware 03.17, case firmware 02.56 and soundcore app 5.5.0. SoundGuys plays real music peaking at 75 dBSPL. Codec and host are not stated.","measured_frequency_response_notes":"Objective measurements section. SoundGuys compares the default sound with its headphone preference curve.","measured_microphone_notes":"SoundGuys microphone demos in ideal, office, street, windy and reverberant conditions. No numerical speech bandwidth or noise score is stored."}},{"url":"https://www.amazon.com/dp/B0DBHPZLCC","kind":"retailer","accessed":"2026-10-20","fields":["warranty_years","case_weight_g","case_dimensions_mm","in_the_box"],"notes":{"warranty_years":"Amazon US listing says 18 months warranty.","case_weight_g":"Amazon US detail table lists carrying case weight 51 g. SoundGuys also lists case 51 g in its review spec box and 52 g with case on its product page.","case_dimensions_mm":"Amazon US detail table labels carrying case length 6.5 cm, width 6.2 cm and height 29.6 mm. Length is stored as depth. SoundGuys lists 65 x 62 x 30 mm with no axis names.","in_the_box":"Amazon US built-in media list: cable, charging case, XXS/XS/S/M/L/XL ear tips with size M pre-installed, and the earbuds."}},{"url":"https://mezha.ua/en/2024/10/07/anker-soundcore-liberty-4-pro-is-presented-tws-headphones-with-anc-and-up-to-40-hours-of-battery-life-for-129/amp/","kind":"press","accessed":"2026-10-20","fields":["hi_res_audio","anc_mic_count","sensors"],"notes":{"hi_res_audio":"Mezha says the earbuds are Hi-Res Audio Wireless certified.","anc_mic_count":"Mezha describes seven sensors as six microphones and a barometer. Calls also use the six microphones.","sensors":"Seven sensors including one barometer."}},{"url":"https://www.macerkopf.de/2025/01/07/anker-soundcore-liberty4-pro-ces2025/","kind":"press","accessed":"2026-10-20","fields":["hi_res_audio","anc_mic_count","sensors"],"notes":{"hi_res_audio":"Names the Hi-Res Audio Wireless standard.","anc_mic_count":"Six noise cancelling sensors plus a barometric pressure sensor for an airplane mode.","sensors":"Barometric pressure sensor for the airplane mode. The same article gives a 149.99 euro price at its January 2025 launch while other reports say 129.99, so no euro price is stored."}},{"url":"https://www.phileweb.com/sp/news/d-av/202605/27/65209.html","kind":"press","accessed":"2026-10-23","fields":["successor"],"notes":{"successor":"PhileWeb's launch report names the Liberty 4 Pro as the previous model of the Liberty 5 Pro series."}},{"url":"https://www.expertreviews.co.uk/technology/headphones-audio/soundcore-liberty-5-pro-review","kind":"press","accessed":"2026-10-23","fields":["successor"],"notes":{"successor":"Expert Reviews names the Liberty 4 Pro as a predecessor of the Liberty 5 Pro."}}],"fields_filled":86,"updated":"2026-10-23"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}