Sennheiser HD4.40BT Wireless

TECHNICAL DATA

Impedance: 18 Ω

Frequency response (microphone): 100 - 10,000 Hz

Frequency response: 18 - 22,000 Hz

Sound pressure level (SPL): 113dB (Passive: 1kHz/1Vrms)

THD, total harmonic distortion: <0.5% (1kHz/100dB)

Pick-up pattern: Dual omnidirectional microphones

Battery Specification: Li-ion Polymer Battery

Codecs: AptX