V11 Bluetooth speaker Wireless speakBluetooth version: 4.2+EDRSNR: =70(dB)Distortion rate: <1%Output power: 3WBattery capacity: 400mAh (Internal)Frequency response: 100Hz-20kHzEffective distance: up to 10 metersCharging voltage: DC 5V/500MA(USB)Working voltage: DC 3.7VMaterial: New ABSMachine size: 5.3 cm x 5.3 cm x 3.3 c,m. Charging time: 1-3 hoursPlaying time: 2-3 hoursControl: buttonSpeaker: 45mm