Sennheiser Accentum Open Black

Play by Your Own Rules.

ACCENTUM Open brings a dose of Sennheiser sound to a lightweight, open design. With 28 hours of battery life, seamless multitasking, and IPX4 splash resistance, these earbuds deliver rich, natural audio without isolating you from the world around you.

Key Features:

• Sennheiser-Tuned Sound: Expertly tuned by acoustic specialists for superior open audio, delivering rich, detailed sound precisely calibrated for clarity and depth. Enjoy a premium live listening experience that blends naturally with your surroundings.
• Stay Aware, Stay Connected with Open Design: Calls, kids, or life – youre always aware while your music keeps you moving. Connected, available, and present all day thanks to the natural awareness of open design.
• All-Day Playback: Up to 28 hours total playtime with the pocket-sized charging case, keeping your music playing from morning to night.
• Comfortable Fit: A lightweight, open design with ergonomic stems ensures comfort without pressure, fatigue, or isolation of traditional in-ear headphones.
• Effortless Use, No Manual Required: Seamlessly switch between devices with multipoint connectivity – calls, music, no hassle. Enjoy smart pause, touch controls, and pairing with up to 8 devices, all in a design so simple and ready to use – no manuals, no apps, just press play.
• 11mm Dynamic Driver: Delivers powerful, dynamic sound for a balanced, full-spectrum listening experience.
• Ready for Rain or Shine: IPX4 certification for splash resistance to withstand any weather.

Technical Specifications

• Style: True wireless stereo earphones
• Ear Coupling: In-Concha (In-concha earphones sit in the outer cavity of the ear)
• 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 and 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
• Microphone Principle: MEMS
• Microphone Frequency Range: 100 Hz to 10 kHz
• Microphone Pickup Pattern: 2 microphones per earbud, beamforming for noise reduction
• Charging Time: Approximately 1 hour for full charge. After 10 minutes of charging, 1.5 hours of music playback
• Power Supply: 5 V, 500 mA max; USB charging via USB-C port on charging case
• Weather Resistance: IPX4, splash resistant (earbuds only)
• Country of Origin: Designed by Sennheiser in Germany, manufactured in China

Connectivity

• Bluetooth 5.3 compliant, class 1, 10 mW (max)
• Bluetooth Classic

Battery Life

• Up to 6 hours of music playback with the earbuds
• Up to 28 hours total music playback with the charging case (test conditions: iPhone, medium volume 85 dB)

Battery Type

• Built-in rechargeable lithium-ion batteries
• Left/Right earbud: 35~36 mAh
• Charging case: 380~400 mAh

Product Weight

• 38 g (both earbuds and charging case)
• 4.35 g (single earbud) / 29.3 g (charging case)

Product Dimensions: 51.77 x 50.18 x 25.36 mm (earbuds and charging case)

Operating Conditions

• Operating Temperature: 0 to +40°C
• Charging Temperature: +5 to +35°C
• Relative Humidity 10 to 80%, non-condensing

Storage Conditions

• Temperature: -20 to +60°C
• Relative Humidity 10 to 90%