Sennheiser HD 350BT Wireless Headphones, German Design, Upto 30h Battery, Comfortable & Lightweight Over Ear Design, Built-in Mic For Clear Calls, Fast Charging, 2y Warranty, Black

Sennheiser HD 350BT Wireless Headphones (Black)

The Sennheiser HD 350BT is a closed-back, over-ear Bluetooth headphone built for listeners who want long battery life, reliable wireless codecs and a foldable design for daily carry. Its 32 mm dynamic transducers are tuned for a full, detailed sound across an 18 Hz to 22,000 Hz frequency response, and support for aptX Low Latency keeps audio in step with video on compatible devices. With up to 30 hours of playback, USB-C charging, a built-in microphone for calls and control through the Sennheiser Smart Control app, the HD 350BT covers commuting, work and home listening in one lightweight package. This listing is for the Black finish.

Key features

• 32 mm dynamic transducers in a closed-back, over-ear design
• Frequency response of 18 Hz to 22,000 Hz
• Bluetooth 5.0 with aptX, aptX Low Latency, AAC and SBC codecs
• Up to 30 hours of battery life per charge
• USB-C charging, full charge in approximately 2 hours
• Built-in MEMS microphone with dual beamforming array for calls
• Dedicated voice assistant button and ear-cup controls
• Foldable design with padded headband and ear pads

Sound and codecs

The HD 350BT uses dynamic, closed transducers, so the ear cups passively isolate the listener from surrounding noise while keeping the sound contained. The rated sound pressure level is 108 dB at 1 kHz, with total harmonic distortion below 0.3 percent at 1 kHz and 100 dB SPL. Codec support is broad: aptX and aptX Low Latency for Android and other compatible sources, AAC for Apple devices, and SBC as the universal fallback. aptX Low Latency is the practical highlight for anyone who watches video or plays games over Bluetooth, because it reduces the audio delay that causes lip-sync drift on standard connections. The Smart Control app for iOS and Android adds an equaliser for shaping the sound and a podcast mode that improves speech intelligibility.

Battery, charging and controls

The built-in lithium-polymer battery is rated at 300 mAh and delivers up to 30 hours of music playback via Bluetooth, measured with the SBC codec. Charging is over USB-C at 5 V and takes up to 2 hours for a full charge. Controls on the ear cup manage playback and calls, and a dedicated button summons the voice assistant on the connected phone, such as Siri or the Google Assistant. Bluetooth profiles include HSP and HFP for calls, A2DP for music streaming and AVRCP for remote control of the source device.

Calls and everyday comfort

For calls, the HD 350BT carries a MEMS microphone system: a dual omnidirectional, 2-mic beamforming array with a speech frequency response of 80 Hz to 6,000 Hz, which focuses on the wearer’s voice in reasonably quiet surroundings. The headphones weigh approximately 238 g, fold flat and fold up for transport, and use a cushioned headband with oval ear pads shaped to sit around the ear. There is no active noise cancellation and no wired audio input on this model: it is a purely wireless headphone, designed around Bluetooth listening.

The HD 350BT suits students, commuters and home listeners who want a recognised tuning, a full week of typical listening between charges, and low-latency video sound without moving into flagship territory. Pair it with a phone, tablet or computer over Bluetooth 5.0, adjust the equaliser once in the Smart Control app, and it handles music, podcasts, calls and video from the same pair of headphones.