Model number: MT-BTH002 40mm speaker Sensitivity: 116 + 3 dB Impedance: 32 + 15% Response frequency: 20–20 kHz Omnidirectional microphone Mic Mic drive unit: ¢6.0*5mm 35 t3 dB is the sensitivity. Interface: Type-C Length of cable: 1.20 meters Measurements: 170*70*180 mm Weight: 135 x 5 grams