1, the use of advanced Bluetooth audio decoding chip, support for all Bluetooth devices connected (L2CAP/A2DP/AVRCP) support HSP/HFP (Handsfree profile) 2、Support FM radio, you can directly search for radio stations in the listening area; Bluetooth receiving distance can be up to 10 metres long 3、Support LINE IN audio input, provide you with computer speaker function. Can be directly connected to mobile phones / tablets / and TV Bluetooth pairing to play music; direct reading TF card and U disk; 4, soft and clear tone with dynamic, each level is clear; support TWS. two of the same device can be composed of dual-channel sound. 5, detailed parameters: Battery capacity: about 500mAh - Built-in voltage: 3.7V - Normal volume playback: 2-3H - Speaker specifications: ¢ 52mm * 1 - Speaker power: 4Ω/5W * 1 - Frequency response: 120Hz-20KHz - Charging input: 5V/500mA - Charging time: about 3H