1: Drive Dimension: 53mm
2: Impedance: 64 Ω
3: Sensitivity: 100±3dB
4: Frequency Range: 12-25kHz
5: MIC Size: 6.0*2.7mm
6: MIC Sensitivity: -38±3dB; Impedance: 2.2kHz
7: Audio Cable: OD 5mm*170mm (including connector)                                                            8: Receiver: C-to-A Port Dual-in-One
9: Supported Protocols: A2DP/HFP/HSP/AVRCP
10: Bluetooth 5.4, Effective Range: >10m  
11: Carrier Frequency (MHz): 2402–2480MHz
12: Battery: 2000mAh 3.7V, Charging time: Approx. 4 hours  
13: Operating time: 250H (at approx. 50% volume - lights off)