Casti Sennheiser Momentum 4 Wireless over-ear, Bluetooth 5.2

Wearing style: Headband stereo headphones
Ear Coupling: Around-the-ear, circum-aural
Connectivity: Bluetooth 5.2 compliant, class 1, 10 mW (max)
Transmission frequency: 2,402 MHz to 2,480 MHz; GFSK, π/4 DQPSK / 8 DPSK
Supported Profiles: A2DP, AVRCP, HFP
Codecs: SBC, AAC, aptX™, aptX adaptive™
Speaker Type: Dynamic
Transducer principle: 42mm diameter
Speaker frequency range: 6 Hz to 22 kHz
Speaker sensitivity: 106 dB SPL (1 kHz / 0 dB FS)
Total harmonic distortion (THD): Speaker: <0,3% (1 kHz / 100 dBSPL)
Impedance: Speaker: Active 470 ohms / Passive 60 ohms
Active Noise Cancellation: Hybrid Adaptive ANC
Microphone principle: MEMS
Frequency response (microphone): 50 Hz to 10 kHz