PzzP USB Bluetooth 5.0 Adapter Wirele BT 5.0 Receiver Dongle High Speed Transmitter Mini Bluetooth USB Adapter For PC Laptop NOT suitable for all IOS devices including Mac, iPad and iPhone,it can't work in car stereo or TV !!! it can only use for computer. Specifications: Item Name: V5 Bluetooth 5.0 Adapter Interface: USB 2.0 Transfer rate: Max 24Mbps Bluetooth Version: Bluetooth V5.0 Frequency Band: 2.400-2.480GHz Color: Black Item Size: 21x16x5 mm Operation System: Windows 7/ 8/ 10/ Vista/ XP/ 2000/ 98/ Me etc. Low-power selectable :1.2 to 3.6 VI/O. Supporting multiple languages. Compatible with Bluetooth v1.2/2.0/2.1/3.0/4.0 Supporting multiple languages. Key Description:"+": Long pre is to switch to the next song; short pre is volume +"-": Long pre is to switch the previous song; short pre is the volume-"M": Switch mode/pause/play/answer callNote: The button can only be used in receiving modeMode switchingLong pre the M button to switch:red light on means switching to Transmit modeblue light on means switching to receiving modeUse for computer:When you use it on your computer, Can be used to connect Bluetooth headsets or Bluetooth speakers. No need audio cable and no driver required, plug and play (only audio can't transmit data).How to use: Switch to the transmit mode, the red light flashes, and the Bluetooth speaker or Bluetooth headset is turned on at the same time, it will be automatically paired. After the pairing is succeful, the red light will be on.Use for other devicesWhen used on other non-computer devices with audio output, such as a TV, Can be used to connect Bluetooth headsets or Bluetooth speakers How to use: 1.Plug one end of the audio cable into the audio output of the speaker and the other end into the audio of the RT02. 2.Plug the RT02 into usb (5V DC) and confirm that it is in receiving mode (blue light flash). Find the pairing name in the Bluetooth settings of the phone: RT02, click to pair. Handsfree In the receiving mode, after pairing with the mobile phone, if the mobile phone calls, you can answer it through RTO2, built-in high-definition MIC, pre the M key to answer or hang up. Function 1. Mini USB Bluetooth 5.0 adapter with high speed up to 3Mbps. 2. Bluetooth low energy Wirele USB Dongle. 3. Dual-mode Bluetooth transfer. 4. Low-power selectable 1.2 to 3.6 VI/O. 5. Supporting Bluetooth voice data. 6.Supporting multiple languages. 7.Compatible with Bluetooth v1.2/2.0/2.1/3.0/4.0/5.0 Specifications Item Name: Bluetooth Adapter Chip: Realtek 8761 Interface: USB 2.0 Transfer rate: 3Mbps Bluetooth Version: Bluetooth V5.0+EDR Frequency Band: 2.400-2.480GHz Color: Black Item Size: 21x16x5 mm Receiving Range: About 30M, In an open environment UP TO 50M Operation System: Windows7/ 8/ 10/ / 2000/ 98/ Me etc. Not support : windows xp/ vista , linux , mac os