Product details: Bluetooth version: Zhongke Lanxun D023964 Drive device: 1 x 5W full frequency unit Product support: Universal devices, automatic decoding of common audio formats Product features: free high-definition one-touch calls, IPX5 waterproof water and dustproof Product size: width 76mm * height 90mm Charging compartment battery capacity: 1800mAh (rechargeable lithium-ion battery) Sound unit: 16-core double magnetic inner magnet diameter of 45mm Microphone: Built-in noise canceling microphone Working voltage: 3.7V Product power: 5W Input support: DC 5V Product frequency: 100Hz-18KHz Wireless working range: 5m high fidelity output, effective distance 10m Charging port: MICRO-USB Battery life: about 12 hours (about 5 hours at maximum volume) Charging time: about 3-4 hours Product material: plastic Eco-friendly ABS + nylon fabric + rubber oil + metal patch. List of accessories: portable portable hook * 1 audio * 1 charging data cable * 1 Chinese-English-Japanese manual * 1 Chinese-English-Japanese warranty card * 1 Speaker weight: 230 g Function: 1. Key switching: press and hold for 3 seconds to switch the machine. 2. Volume-/previous song key: short press volume down, long press previous song; 3. Play/Pause/Press Play, Pause. 4. Volume +/Next key: short press volume up, long press next song. 5. TWS interconnection, TWS function, two speakers are turned on at the same time, then double-click one of the speakers, and there will be a prompt tone when connected."