Version 5.1 of Bluetooth Conversation Duration: Up to 25 Hours Up to 35 hours of music Standby Duration: More than 150 Hours Charging Time: 1-1.5 Hours Type of Charging: Micro USB Getting charged Power: 150 mAh at DC5V Transmission Range: 32 feet (10 meters) Power Output: 3mW × 2 Sensitivity at 1 KHz: 02dBat 16 Ohms of impedance Range of Frequencies: 20 Hz–20 KHz THD: less than 1% HSP, HFP, A2DP, and AVRCP Mic Sensitivity: -42dB Supported Prodiles Impedance of the Mic: 2200 Ohm