USB Bluetooth 5.3 Adapter Transmitter Receiver Bluetooth Audio Bluetooth Dongle Drive Free Wirele USB Adapter for PC Laptop Name: USB Bluetooth Adapter Model: BT804 Bluetooth version: 5.3 (BLE low power consumption, low latency) Transmiion distance: 20 metres (barrier-free environment) Support protocols: A2DP, HSP, AVRCP, HID, AAC, etc. Package Size: 13.3*10.8*1.8cm Package weight: 29g Packing list: adapter *1 instructions *1 CD disc *1 colour card packaging *1 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 chip, RF transceiver, providing lower latency, flexible and powerful Bluetooth applications. Supports Ca2 power level 20m range (in open environment) Support Bluetooth 5.3 dual mode specification (LMP 12.45 true Bluetooth 5.3 standard) Supports USB 2.0/3.0 interface Supports simultaneous connection of multiple devices (up to 7 devices) Operating temperature -20 to 70C Support OS: Windows 8.1, 10, 11 (driver-free, plug and play), Windows 7 system can be installed to use the driver Support protocols: HFP/HSP (speakerphone/headset) A2DP/ AVRCP (stereo music) HID/HOGP (keyboard and mouse). Android smart phones, etc.