ACCENTUM True Wireless

Released May 2024.5 Last checked 16 October 2026.

Form factor: In-ear
ANC: Yes
Battery life: 8h
With case: 28h

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All specs

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General

Series: ACCENTUM5
Model numbers: ATW1, ATW1 R, ATW1 L, ATW1 C, 700262, 700263, 7002641 2 3 4 7
GTIN / EAN: 4260752331241, 4260752331258, 4260752331265, 810091271148, 810091271155, 8100912711622
Announced: 7 May 20245
Status: Available1 7
Predecessor: Not available
Successor: Not available
Launch price (US): $199.995 8
Launch price (EU): €199.96
Markets: US, CA, DE, GB, AU5 6 10
Colours: Black, White, Blue1 5 7
Segment: Not available

Design

Form factor: In-ear1 3
Bud shape: Stemless3
Use one bud alone: Either bud3
RGB lighting: Not available

Drivers and sound

Drivers per bud: Type Diameter (mm) Count per earbud
Dynamic 7 1
Source1
Driver type: Dynamic1
Driver size: 7mm
Drivers per bud: 1
Diaphragm material: Not available
Frequency response: Min5 HzMax21 kHz1 2
Impedance: Not available
Sensitivity: 107dB1 2
Sensitivity reference: Per 1 mW1 2 3
Max sample rate: Not available
Max bit depth: Not available
Adaptive EQ: Not available
Personalised sound: Yes1 3 8
Onboard EQ: Yes3
Custom EQ bands: 51 5
EQ presets: Not available
Volume limit: Not available

Type	Diameter (mm)	Count per earbud
Dynamic	7	1

Spatial audio

We could not find any of these 2 fields. Show them

Spatial audio: Not available
Head tracking: Not available

Noise cancelling

Active noise cancelling: Yes1
ANC type: Hybrid1 3 5
ANC microphones in both earbuds: 43
Adaptive ANC: Yes3
ANC levels: Not available
ANC attenuation (claimed): Not available
Transparency mode: Yes1
Adjustable transparency: Yes3 5 9
Automatic ANC and transparency blend: Not available
Conversation detection: Not available
Wind noise reduction: Yes3 9

Measured

Frequency response notes (measured): Default sound over-emphasizes bass by a couple of dB against the SoundGuys target and under-emphasizes the mids around 500 Hz and 3 kHz by up to 5 dB. There is a boost of a couple of dB around 13 kHz. With ANC on the bass is more emphasized.8
Bass amount (measured): Not available
Treble amount (measured): Not available
Deviation from target (measured): Not available
Consistency between fittings (measured): Not available
Harmonic distortion (measured): Not available
Sound leakage (measured): Not available
Noise isolation (measured): Not available
Noise isolation, best (measured): Not available
Passive isolation (measured): Not available
Call quality notes (measured): Clear in a quiet room. The microphones struggle to attenuate simulated office, street and wind noise.8
Mic low-frequency extension (measured): Not available
Mic high-frequency extension (measured): Not available
Mic speech-to-noise ratio (measured): Not available
Latency (measured): Not available
Bluetooth latency, worst (measured): Not available
2.4 GHz latency, worst (measured): Not available
Latency in game mode (measured): Not available
Battery life (measured): ANC Codec Hours (h)
No AAC 8.5
Yes AAC 5.5
Source9
Longest tested use per charge: 8.5h
Battery life with case (measured): Not available
Full charge time (measured): 55min9
Weight per bud (measured): Not available

ANC	Codec	Hours (h)
No	AAC	8.5
Yes	AAC	5.5

Microphones and calls

Voice microphones in both earbuds: 41 3
All microphones in both earbuds: 43
Bone conduction voice sensor: Not available
Mic noise reduction: DSP3
Call audio bandwidth: Not available
Mic mute control: Yes3
Sidetone: Yes9

Connectivity

Chip: Not available
Connections: Bluetooth1
Bluetooth: 5.31
Bluetooth codecs: SBC, AAC, aptX, LC31
Bluetooth profiles: A2DP, AVRCP, HFP, TMAP, PBP1
LE Audio: Yes1 2 3 5
Auracast: Yes1 3 5
Multipoint: Yes3 8 9 11
Multipoint devices: 23 9
Multipoint with LDAC: Not available
Paired devices remembered: 63
Automatic switching between own devices: Not available
Fast pairing: Not available
Audio sharing: Not available
Wireless range (claimed): Not available
Wireless receiver: Not available
Receiver connector: Not available
Simultaneous 2.4 GHz and Bluetooth audio: Not available

Latency

Low latency mode: Yes3 9
Claimed latency: Not available
Lowest claimed latency: Not available

Compatibility

Platforms: Not available
Connection per platform: Not available
Features that need a specific device: Feature Needs
Auracast Firmware update. Broadcasts are chosen in the Sennheiser Smart Control app.
Eco mode Only with sources that support aptX. The mode turns aptX off and sends SBC or AAC.
Claimed battery life Manual test: smartphone at 1 m, Bluetooth AAC codec, volume 50 percent, ANC off. The US spec table says iPhone at a mid volume of 85 dB.
Source1 3
Official licence: Not available

Feature	Needs
Auracast	Firmware update. Broadcasts are chosen in the Sennheiser Smart Control app.
Eco mode	Only with sources that support aptX. The mode turns aptX off and sends SBC or AAC.
Claimed battery life	Manual test: smartphone at 1 m, Bluetooth AAC codec, volume 50 percent, ANC off. The US spec table says iPhone at a mid volume of 85 dB.

Battery and charging

Battery per bud: 55mAh1 2 3
User-replaceable earbud battery: Not available
Claimed battery life: Mode Codec Includes case recharges Hours (h)
ANC off AAC No 8
ANC on Not available No 6
ANC off AAC Yes 28
Source1 2 3
Longest claimed use per charge: 8h
Playback per charge with ANC (claimed): 6h
Playback per charge without ANC (claimed): 8h
Total with case (claimed): 28h
Total with case and ANC (claimed): Not available
Talk time (claimed): Not available
Full charge time, buds: Not available
Charging guidance: A full charge of the case and the earbuds together takes about 1.5 hours. Ambient temperatures below 15 C or above 30 C and Qi wireless charging lengthen the time. Charging works between 5 C and 35 C. The case takes 5 V over USB-C. The spec sheet and manual say 500 mA at most and the US page says 1000 mA at most. A battery protection mode charges the earbuds to about 80 percent.1 2 3
Quick charge time: 10min1 5
Earbud playback after quick charge: 1h1 5

Mode	Codec	Includes case recharges	Hours (h)
ANC off	AAC	No	8
ANC on	Not available	No	6
ANC off	AAC	Yes	28

Charging case

Case battery: 400mAh1 2 3
User-replaceable case battery: Not available
Case charging port: USB-C1
Case full charge time: Not available
Wireless charging: Yes1 3 5
Wireless standards: Qi1 3
Wireless charging power: Not available
Speaker in case: Not available
Screen on case: Not available
Case works as audio transmitter: Not available

Controls

Controls: Touch1 3
Earbud volume control: Touch3
Gestures: Right tap once: play or pause, answer a call, Left tap once: transparency mode on or off, Left tap twice: previous track, Right tap twice: next track, Left tap three times: ANC on or off, Right tap three times: voice assistant, Touch and hold left: volume down, Touch and hold right: volume up, Tap twice in a call: end a call or reject an incoming call, Tap once in a call: mute or unmute the microphones3
Remappable controls: Yes1 3
Voice assistant: Siri, Google Assistant3

Sensors and health

In-ear detection: Yes3
Sensors: Not available
Heart rate sensor: Not available
Skin temperature sensing: Not available
Hearing aid feature: Not available
Medical clearances: Not available
Hearing test: Yes1 8
Hearing protection: Not available
Health features: Not available

Fit and durability

Ear tips included: XS, S, M, L1 3
Ear tip materials: Silicone1 3
Stabilisers: Not available
Ear tip fit test: Yes3
Dust and water rating, buds: IP541 2 3
Dust and water rating, case: Not available
Water resistance depth: Not available

Software

Companion app: Sennheiser Smart Control1 3
App platforms: Android, iOS1
User firmware updates: Yes3
Finding network: Not available
Precision finding: Not available
Live translation: Not available

Dimensions and weight

Weight per bud: 5.5g(0.2 oz)1 2 3
Bud dimensions: Not available
Case weight: 41g(1.4 oz)1 2 3
Case dimensions: Not available

Certifications

Hi-Res Audio: Not available
Communication certifications: Not available
FCC IDs: 2A3ULATW14
Other certifications: Not available

In the box

In the box: Earbud R (ATW1 R) and earbud L (ATW1 L), Charging case (ATW1 C) with built-in battery and wireless charging, USB cable with USB-C and USB-A connector, approx. 0.4 m, Silicone ear tips in sizes XS, S, M (fitted on delivery) and L, Quick guide, Safety guide1 3
Cables included: Type Length (m) Count
USB-C to USB-A 0.4 1
Source1 3