Bluetooth version: v4.1 Charging Time:1-2H standby Time: 120H Bluetooth Profiles: A2DP, AVRCP, HSP, HFP Sensitivity: 98dB Talking/Music-playing Time: 4-5H (The final time dependent on the actual work condition) Operating Distance: 10M Frequency Range: 20-20KHZ Speaker Impedance :16 OHM Drive unit :Ø9mm Charging Interface: USB Chip: CSR Weight:13.4g Battery capacity: 65 mAH Package: blister box