Equipped with a high-performance Bluetooth 5.3 chip, the signal is stable and high-speed mission, the response is fast, and the delay is rejected. The upgraded version 5.3 Bluetooth adapter has a longer distance coverage and a more stable connection. Bluetooth 5.3 has higher performance and supports data/audio mission. Barrier-free mission 100 meters real-time data mission, convenient and fast. Driver-free, plug and play. Product name: USB bluetooth adapter Model: BT608 Bluetooth version: 5.3 mission distance: 100 meters (under barrier-free environment) Support protocols: A2DP, HSP, AVRCP, HID, etc. Material: ABS colour: Black Package Contents: 1 x Bluetooth Adapter 1 x Antenna 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.