Function: 1. Switch key: long press for 3 seconds to switch on and off 2. Volume -/Previous song key: Short press the volume down, long press the previous song; 3. Play/pause/click to play, pause. 4. Volume +/Next song button: Short press the volume plus, long press a song. 5. TWS interconnection, the two speakers with TWS function are turned on at the same time, and then double-click one of the speakers, and there will be a beep when connected Bluetooth version: Zhongke Lanxun D023964 Drive device: 1*5W full frequency unit Product support: general equipment, automatic decoding of common audio formats Product function: One-key free high-definition call, IPX5 waterproof and dustproof Product size: width 76mm*height 90mm Rechargeable battery capacity: 1800mAh (rechargeable lithium ion battery) Sound unit: 16-core dual magnetic, inner magnetic diameter 45mm Microphone: built-in noise reduction microphone Working voltage: 3.7V Product power: 5W Support input: DC 5V Product frequency: 100Hz-18KHz Wireless working range: 5m high-fidelity output, 10m effective distance Charging socket: MICRO-USB Endurance time: about 12 hours (maximum volume is about 5 hours) Charging time: about 3-4 hours Speaker weight: 230g Colour: Black Material: ABS+nylon cloth+rubber oil+metal patch Size: 7.6 x 7.6 x 9cm Package Contents: 1 x portable hand hook 1 x speaker 1 x charging data cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.