1. The six core functions are newly upgraded. It is better to buy the right one at a time than to buy it and return it. 2. The device is equipped with a variety of audio interfaces, compatible with audio playback devices, the interface is rich and the connection is simple to meet more needs 3. Equipped with a high-performance Bluetooth 5.3 chip, low-loss data transmission, quick response, stronger anti-interference, say goodbye to delays, freezes and other problems 4. It is more convenient to realize the wireless connection of ordinary wired speakers with Bluetooth function mobile phone to listen to songs 5. Built-in NFC sensor chip, the mobile phone can be connected within seconds to support mobile phone and tablet with NFC function, avoiding cumbersome manual connection Model: T59 Interface: USB Whether plug and play: plug and play Transmission rate: 5 (Mbps) Effective work: radius 10 (m) Bluetooth standard: 5.3 Working frequency: 2.4 (MHz) Bluetooth solution: 5.3 , A2DP, , AVRCP Frequency: 2.4GHz-2.48GHz Power supply voltage: DC 5V (without built-in battery) Bluetooth receiving function: connect 1 mobile phone Support: TF card, U disk playback Colour: Black Material:ABS Size: 6.8 x 5.8cm Package Contents: 2 x host 2 x 3.5mm audio cable 2 x TYPE-C power cable 2 x Chinese and English manual Only the above package content, other products are not included. Note: Light reflection 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.