- Bluetooth : v5.0 - Drivers: 0.9mm - Battery Capacity: 120mAh - Play Time: 7.2 hours - Charging Time: 1.5 hours - Input: 3.7V Micro USB - Impedance: 32 Ω - Frequency Range: 50Hz-20kHz - Driver Sensitivity (SPL) : >92dB - Microphone Sensitivity: -42dB+-2