ACCENTUM Open
Play by your own rules.
Image of white Sennheiser ACCENTUM Open earbuds in a cream charging case.
? Sennheiser sound quality ?️ Breathable open design ? 28 hrs Battery playtime
Product Overview
ACCENTUM Open earbuds from Sennheiser deliver a rich, natural sound experience in a lightweight open design. They feature 28-hour battery life, seamless multitasking, and IPX4 splash resistance, providing audio without isolating the listener from their surroundings.
Key Features
- Sennheiser tuned sound: Acoustic experts have tuned the sound for superior clarity and depth, creating a premium audio experience that feels alive and blends naturally with the environment.
- Stay aware, stay engaged with open design: The open design allows users to remain aware of their surroundings, whether for calls, conversations, or general awareness, while enjoying music.
- All-day playtime: Offers up to 28 hours of total playtime with the pocket-sized charging case, ensuring music playback from morning to night.
- Breathable fit: A lightweight, ergonomic stem design provides comfort without pressure, fatigue, or the isolation associated with traditional in-ear designs.
- Effortless use: Features multipoint connectivity for seamless switching between devices, smart pause, intuitive touch controls, and pairing with up to 8 devices, designed for simple, immediate use without requiring manuals or apps.
- 11 mm dynamic transducer: Delivers powerful, dynamic sound for a balanced, full-spectrum listening experience.
- Rain or shine ready: IPX4 splash resistance rating ensures durability in various weather conditions. ? [water resistant]
Technical Data
Product Variants
| Model name | Order name | Article no. | EAN | UPC |
|---|---|---|---|---|
| ACCENTUM Open Cream | OTW1 Cream | 700446 | 4260752333429 | 810091273517 |
| ACCENTUM Open Black | OTW1 Black | 700430 | 4260752333245 | 810091273357 |
| ACCENTUM Open Mousse | OTW1 Mousse | 800090 | 4260752334112 | 810091274255 |
Product Specification
| Attribute | Details |
|---|---|
| Wearing style | True wireless stereo earphones |
| Ear coupling | In-Concha |
| Connectivity | Bluetooth 5.3 compliant, class 1, 10 mW (max) Bluetooth Classic ? [Bluetooth] |
| Transmission frequency/modulation | 2,402 MHz to 2,480 MHz; GFSK, π/4 DQPSK / 8DPSK |
| Supported profiles | A2DP, AVRCP, HFP |
| Supported codecs | SBC, AAC |
| Speaker principle | Dynamic |
| Speaker type/size | Dynamic, 11 mm diameter |
| Speaker frequency range | 25 Hz to 15 kHz (@ 90 dB SPL) |
| Speaker sensitivity | 109 dB SPL (1 kHz / 1 mW) |
| Speaker THD | <0.08% (1 kHz / 94 dB) |
| Speaker impedance | Not applicable (active BT headphones) |
| Active Noise Cancellation | Not applicable |
| Mic principle | MEMS |
| Mic frequency range | 100 Hz to 10 kHz |
| Mic pick-up pattern | 2 mics per earbud, beamforming for noise reduction |
| Battery lifespan | Up to 6 hrs music playtime with earbuds; Up to 28 hrs overall music playtime with charging case (test condition: iPhone, mid volume level 85 dB) ? [battery] |
Product Specification (continued)
| Attribute | Details |
|---|---|
| Charging time | Approx. 1 hr for fully charged; After 10 min charging, 1.5 hrs music playtime |
| Battery type | Built-in Lithium-Ion rechargeable batteries (Left/right earbud: 35~36 mAh; Charging case: 380~400 mAh) |
| Power supply | 5 V, 500 mA max; USB charging via USB-C socket at charging case |
| Weather resistance | IPX4, splash resistant (earbuds only) ? [water resistant] |
| Product weight | 38 g (both earbuds and charging case); 4.35 g (single earbud) / 29.3 g (charging case) |
| Product dimension | 51.77 x 50.18 x 25.36 mm (earbuds and charging case) |
| Operating condition | Operating Temp: 0 to +40°C; Charging Temp: 5 to +35°C; Rel. humidity 10 to 80%, non-condensing |
| Storage condition | Temp: -20 to +60°C; Rel. humidity 10 to 90% |
| App support | No app support |
| Country of origin | Designed by Sennheiser in Germany, Made in China |
| Custom tariff code | 851762 (BT headsets) |
| HAZMAT UN # | UN 3481 |
Packaging Specification
| Attribute | Details |
|---|---|
| Content of delivery | ACCENTUM Open earbuds, Charging case, USB-C charging cable |
| Packaging type | Pizza box |
| Language on packaging | English, German, French |
| Dimensions product packaging (L x B x H) | 90 x 33 x 105 mm |
| Weight of headset and packaging (incl. accessories) | 121 g |
| Dimensions of outer master carton (L x B x H) | 380 x 175 x 240 mm |
| Number of products per outer master carton | 40 |
| Total weight of outer master carton and products | 5290 g |
| Material of single package (incl. weight) | Paper/Cardboard: 39.5 g; Plastic: 0 g |
| Material of outer master carton (incl. weight) | Paper/Cardboard: 450 g; Plastic: 0 g |
| WEEE for single pack | 58 g |
Images showcasing the Sennheiser ACCENTUM Open earbuds and charging case in various colors (black, cream, mousse), along with product packaging details and regulatory marks like Bluetooth, IPX4, and ANATEL.
Battery Information
Note: The black variant may initially be produced by a 2nd source provider until July 2025, after which it will utilize batteries from the 1st source provider. Users should consider this when setting up the product. Sennheiser will provide updates closer to the date.
| Attribute | Charging Case (1st source) | Charging Case (2nd source) | Right Earbud | Left Earbud | Unit |
|---|---|---|---|---|---|
| Usage | Black (from July 2025 on) | Cream / Mousse + Black (from launch to July 2025) | Black (from July 2025 on) | Cream / Mousse + Black (from launch to July 2025) | |
| Lithium-Ion cells | 1 (single) | 1 (single) | 1 (single) | 1 (single) | |
| Qty (# of batteries for this type) inside product | 1 | 1 | 1 | 1 | |
| Qty (# of batteries for this type) outside product | 0 | 0 | 0 | 0 | |
| Vendor | YJ Power | Golden Cel | MBT | VDL | |
| MPN | YJ 801535 | 801435 | MC1042D | VDL1040W1 | |
| Capacity | 400 | 380 | 36 | 35 | mAh |
| Size/Format | Length: 37.0 Width: 15.3 Height: 8.2 | Length: 37.0 Width: 15.2 Height: 8.2 | Diameter: 10.1 Height: 4.8 | Diameter: 10.15 Height: 5.0 | mm |
| Voltage | 3.7 | 3.7 | 3.85 | 3.85 | V |
| Weight | 8 | 9 | 1.1 | 0.9 | g |
| Energy | 1.48 | 1.406 | 0.139 | 0.135 | Wh |
Accessories and Spare Parts
| Category | Order Name | Order # | EAN | UPC |
|---|---|---|---|---|
| Charging Case Black | OTW1 CASE Black | 700431 | 4260752333269 | 810091273371 |
| Earbud Set Black | OTW1 EARBUDS Black | 700432 | 4260752333252 | 810091273364 |
| Charging Case White | OTW1 CASE Cream | 700448 | 4260752333443 | 810091273531 |
| Earbud Set White | OTW1 EARBUDS Cream | 700447 | 4260752333436 | 810091273524 |
| Charging Case Mousse | OTW1 CASE Mousse | 800092 | 4260752334136 | 810091274279 |
| Earbud Set Mousse | OTW1 EARBUDS Mousse | 800091 | 4260752334129 | 810091274262 |
