Sennheiser HD 250BT Bluetooth 5.0 Wireless Headphone - Black

New In Sealed Box Ear coupling: On-Ear Transducer principle: Dynamic Acoustic principle: Closed Weight: 125g Frequency response: 20 Hz to 22,000 Hz Total harmonic distortion (THD): < 0.3 % (1 kHz, 100 dB) Sound pressure level (SPL): 110 dB (1 kHz, 0 dBFS) Frequency response (microphone): 100 Hz to 10,000 Hz Microphone pick-up pattern: Omni-directional Transducer size: 32 mm Charging time: 3 hrs Operating time: 25 hrs Bluetooth version: Bluetooth 5.2medium Bluetooth profiles: AVRCP, A2DP, HFP, HSP Bluetooth Audio Codec: aptX, apt X Low Latency, AAC, SB