Enjoy quality sound on the go. The compatible Bluetooth® 5.0 connection, high-quality audio codecs (AAC, aptX™ Low Latency) and the 30 hours of autonomy make these headphones your versatile companion wherever you are.

Over ear headphones, closed
Dynamic speakers
Foldable design
Support through the dedicated application
EQ and updates via Sennheiser Smart Control
Frequency response
• 18 Hz - 22,000 Hz (-10 dB)
Modulation
• GFSK, π/4 DQPSK, 8DPSK
Sound Pressure (SPL)
• 108 dB (1 kHz/0 dBFS)
Frequency Response (Microphone)
• 80 Hz - 6,000 Hz (-3 dB)
THD, total harmonic distortion
• 0.3 % (1 kHz, 100 dB)
Sound capture mode
• Dual Beamforming
Operating principle (Microphone)
• MEMS
Audio input
• Bluetooth 5.0,
Audio codecs
• SBC, AAC, AptX™, AptX™ Low Latency
Supported profiles
• HSP, HFP, AVRCP, A2DP
Transmission frequency
• 2.402 MHz to 2.480 MHz
Autonomy
• Up to 30 hours (at medium volume - Bluetooth)
Battery specifications
• Built-in 3.7 V, 300mAh lithium-polymer battery
Charging current
• 320 mA max.
Loading time
• Approx. 2 hours
Charging voltage
• 5 V, DC
Enjoy quality sound on the go. The compatible Bluetooth® 5.0 connection, high-quality audio codecs (AAC, aptX™ Low Latency) and the 30 hours of autonomy make these headphones your versatile companion wherever you are.
The HD 350BT provides an immersive sound experience with deep and dynamic bass. Wireless transmission is ensured by Bluetooth® 5.0 technology and high-quality wireless codecs such as AAC, aptX™ and aptX™ Low Latency for perfect audio-video synchronization.
Thanks to an impressive battery life of up to 30 hours and fast charging via USB-C, the HD 350BT is the ideal companion for all-day listening. Available in black or white, these headphones have been made from durable, high-quality materials and feature a compact, foldable design that combines comfort with minimalist style.
Customizing your sound experience is extremely easy with the Sennheiser Smart Control app. The intuitive equalizer allows you to easily adjust the sound to your liking. Podcast mode can be selected to optimize the clarity of podcasts, audiobooks or other types of content.
To enjoy the connected lifestyle, the HD 350BT has a dedicated voice assistant button for easy interaction with Siri or Google Assistant. Controlling music or calls is intuitive, thanks to the touch buttons on the cups.