Model: Celebrat-W11 Wireless version: V5.0 Working frequency: 2402-2480mhz Transmission distance: 10m Best Working distance: <6m Drive unit: 13.2mm Frequency response: 20hz-10khz Battery capacity: Lithium battery 3.7V/30mAh Play time: about 3h (70% volume) Call time: about 3h (70% volume) Charging time: about2h Charging box capacity: 200mAh Charging box charging time: about 2h Standby time: about 120h Input voltage: DC 5V-1A