Bluetooth version: V5.0+EDR Working current: <200mA Speaker: 4Ω Transmission distance: 10m Frequency response: 100Hz-20KHz Output power: 3w *2 Signal to noise ratio: ≥85dB Working voltage: 3.7V Distortion: 1% Charging voltage: DC5V Charging interface: Micro USB Channel: Dual Audio interface: 3.5mm stereo audio connector Call duration: 6h Music player: 6h Standby time: 300 hours Charging time: 6h TWS: Turn on both speakers at the same time, then double click the "M" key