5.3 Bluetooth dual mode dual channel, compatible with Bluetooth 2.0, 3.0, 4.0, 5.0 and 5.1 specifications. Intelligent low-power chips and radio frequency transceivers provide flexible and powerful Bluetooth applications with lower latency Support Cass2 Power level 20 meters distance (in open environment) Support Bluetooth 5.3 dual-mode specification (LMP 12.45 true Bluetooth 5.3 standard) Supports simultaneous connection of multiple devices (up to 7 devices can be connected) Product name: USB Bluetooth adapter Bluetooth version: 5.3 (BLE low power consumption, low latency) Transmission distance: 20 meters (barrier-free environment) Supported protocols: A2DP, , AVRCP, HID, ACC Colour:Black & Green Material:ABS Package Contents: 1 * Transmitter 1 * English instruction 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.