It's no need to install driver and license, plug and play, idea for enjoying movies and playing games. When it is difficult to connect to Bluetooth headset, please refer the following steps to try to pair with Bluetooth headset. 1. Turn off Bluetooth of other Bluetooth transmitting devices like smartphone/iPad. 2. Please make sure your Bluetooth headset/speaker has no connection with other devices, and is in pairing mode. 3. After plug this product into USB jack, please long press button for 10 seconds, and the rapid flashing TX LED indicator will pause temporarily, then immediately continue to flash rapidly. Initialization reset is complete at this time, and it will automatically search and pair with Bluetooth headpset. 4. Some Bluetooth headsets are in pairing mode after power on, but at this time it only can connect to the Bluetooth devices that have been paired before. If you want to pair with an Bluetooth device that didn't pair before, please let the headset indicator flash quickly or refer to the headset manual.

?Corresponding System?Compatible with the system that can output USB digital audio like Windows 10/8/7/Mac OS/iOS/Android/PS3/PS4/PS4 Pro/Nintendo Switch/USB-A/USB-C (OTG)/Micro-USB (OTG). ?Codec Recognition?Display the audio codec that is in use, the corresponding green “SBC/APTX/LL” indicator will be long bright at this time. To use a certain audio codec, both the transmitter and the headset need to support this audio codec. ?Support Talk?Supports wireless talk through Bluetooth headphones, you can easily communicate with other people. Note: it doesn't support talk if used in Nintendo Switch/PS3/PS4/PS4 Pro; If the headphone MIC can not work on Windows 10, please restart the MIC “REIYIN Bluetooth Audio WT04” on Windows 10. ?Low Delay?Adopts CSR8670 chip and supports aptX Low Latency, it can eliminate Bluetooth audio delay and ensure great audio quality, allows you to listen to high quality sound that is in sync with the original audio source. ?Bluetooth Audio Transmitter?Adds Bluetooth to the audio output device like PC/Game devices, pairs with Bluetooth headphones/speakers/audio system, supports two connection simultaneously. (Note: 1. Only transmit audio, no file data. 2. This product can NOT pair with any mobile phone, tablet or Bluetooth keyboard/mouse; 3. Make sure the Bluetooth headphone you need to pair is not paired with other Bluetooth transmitters like mobile phone, iPad.).