1. parameter specifications: bluetooth specification: v5.0 Wireless transmission range: 10m Audio noise ratio:  85dbBattery capacity: 500mah Built-in voltage: 3.7v Normal volume playback: 2h Speaker Specifications: ac85-52mm Power: 5w Frequency response: 50hz-20khz Product size: number Single machine weight: 308g Charging voltage: 5v/500ma?2. resources1. Adopt advanced bluetooth audio decoding chip to support connection of all bluetooth devices;
2. Support for FM radio, you can directly search for radio stations in the listening area; 
3. the tone is soft, clear and dynamic, with distinct levels; 
4. directly read the TF card and U disk;
5. Bluetooth receiving distance can be up to 10 meters; 
6. Support line on audio input, provide computer speaker function; Can be directly connected to cell phone/tablet/and tv bluetooth pairing to play music; 
7. There is no connection in bluetooth mode and it will automatically turn off in half an hour;8. Support tws function