Technical Details Version 5.0 of Bluetooth Profiles for Bluetooth: HSP, HFP, and A2DP Chipset for Bluetooth: BK3266 5V is the input. 32Ω is the impedance. Bluetooth Frequency: 2.402 GHz to 2.480 GHz; 1.5–2 hours for charging Duration of Play: 7 hours Time on Standby: 250 Hours 120mAh is the battery's capacity. Type of Battery: Li-Polymer Ten meters is the operating distance.