USB Bluetooth-compatible 5.1 Adapter Handsfree Dongle Wirele Transmitter Receiver 2.4GHz for Desktop Computer Laptop PCFeature:1. Support multiple devices to connect at the same time:support multiple Bluetooth-compatible devices to connect at the same time, solve the USB gap problem, and meet various occasions2. Drive free for Win8 and above, plug and play:Win8.1/10/1 drive free, plug in to support Win7 (drive required)3. Compatible with multiple Bluetooth-compatible versions:downward adaptation of 4.1/4.2/5.1 Bluetooth-compatible versions4. Universal:Wirele devices such as a keyboard,mouse,speaker,printers,gamepad&more5. Small and lightweight:Bluetooth-compatible 5.1 adapter is small, lightweight, won't take much space, easy to carry or store.Specification:Certification: CEOrigin: Mainland ChinaModel Number: Bluetooth-compatible AdapterProduct size: 21.8*15.7*5.9mm/0.85*0.6*0.23inBluetooth-compatible version: 5.1Frequency range: 2.4GHz (2402-2480MHz)Transmiion distance: 0~20MRated voltage: DC5VInterface type: USBOperating system: Win7, Win8, Win8.1, Win10, Win11 (drive free for systems above Win8)Package weight: 14g Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement. 1 x Bluetooth-compatible Adapter