USB Bluetooth-compatible BT5.0 Wirele Adapter for Pc Computer Receptor Laptop Earphone Audio Printer Data Dongle Receiver CF-B01 -Super Mini Size -Win 8 or more systemsupport Free Driver -Universal USB Port,work stably for a long time. -Supports pairing of multiple devices(Only support one audio device at the same time). -Bluetooth-compatible BT5.0 chip,BLE low power. -Compatible with V4.2 V4.1 -Usage for mobile phone,wirele eraphone,headset,gamepad,mouse,keypad,keyboard,printer etc bluetooth-compatible devices Notice: 1.Only work for Windows Windows7/ 8.1/10(32 and 64bit) System Computer PC,Laptops. Not support MacOS,Car System,Smart TV System. 2.Use For Bluetooth-compatible Devices Connect,Audio/Files Transfer; No Microphone. Files Transfer need Use"Send a file"/"Receive a file"function at first. 3. The transmiion distance is determined by the performance of the receiving and sending devices.0-10M Without obstacles. Please reduce obstacles between device connections. ---Please make sure that your windows computer system has not been modified or streamlined, and the system update function has not been disabled. ---Please disable the Built-in Bluetooth-compatible Devices of the computer before using this adapter. ---If there is no response when the adapter is plugged into the USB port, please try another USB port or try another computer. ---If it still does not work, please contact customer service for additional help.