Sennheiser ACCENTUM Open
Play by your own rules.
Product Overview
The Sennheiser ACCENTUM Open earbuds deliver a premium audio experience with a lightweight, open-design. They offer rich, natural sound without isolating the listener, making them ideal for staying aware of your surroundings. Key features include up to 28 hours of total battery playtime with the pocket-sized charging case, seamless multitasking, and IPX4 splash resistance for durability in various weather conditions.
Key Features:
- Sennheiser Tuned Sound: Acoustic experts have tuned these earbuds for a superior open sound, providing rich, detailed audio that is finely tuned for clarity and depth.
- Situational Awareness: The open design ensures users remain connected and present throughout the day, whether for calls, listening to music, or being aware of their environment.
- All-Day Playtime: Enjoy up to 28 hours of total playtime with the included charging case.
- Breathable Fit: A lightweight, open design with an ergonomic stem ensures 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.
- 11 mm Dynamic Transducer: Delivers powerful, dynamic sound for a balanced, full-spectrum listening experience.
- Rain or Shine Ready: IPX4 splash resistance rating protects the earbuds against water splashes.
Image Description: The Sennheiser ACCENTUM Open earbuds are presented in a cream color, with one earbud in its charging case. The design is sleek and modern, featuring a stem. Icons indicate Sennheiser's renowned sound quality, a breathable open design for situational awareness, and up to 28 hours of battery playtime.
Technical Data
Model 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
| Wearing style | True wireless stereo earphones | ||
|---|---|---|---|
| Ear coupling | In-Concha | ||
| Connectivity | Bluetooth 5.3 compliant, class 1, 10 mW (max) Bluetooth Classic | ||
| 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 k Hz (@ 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) | ||
Image Description: Visuals showcase the ACCENTUM Open earbuds in white and black, alongside their compact charging cases. The product is depicted with its packaging, highlighting key features like Bluetooth connectivity and IPX4 water resistance.
Product Specification (continued)
| 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) | ||
| 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
| 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 | ||
Image Description: Detailed views of the ACCENTUM Open earbuds and charging case, emphasizing their design and portability. Packaging information, including dimensions and materials, is also presented.
WEEE Packaging Information
| 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 | |
Battery Information
Note: The black variant will be initially produced by the 2nd source provider from launch until July 2025. Subsequently, the Black variant will utilize the battery from the 1st source provider. Please consider this when setting up the product. Sennheiser will send a reminder closer to the date via Product Update.
| 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 |
Image Description: Diagrams illustrating the battery specifications for the charging cases and earbuds, detailing capacities, vendors, and formats for different production sources and color variants.
Accessories/Spare Parts
| SPACCs | 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 |
