APT-X Wireless Bluetooth Adapter 4.0 Bluetooth Dongle Music Sound Stereo Bluetooth Transmitter AUX 3.5MM RCA For Spakers Headset Wireless Bluetooth audio transmitter box The Bluetooth-free audio equipment, audio signals emitted through the Bluetooth speaker or Bluetooth headset to receive, can connect two bluetooth devices at the same time Bluetooth chip: CSR8670 (support pairing of two Bluetooth Devices, Support APT-X low latency, suitable with audio and video images, such as television use) Power supply voltage: 5V DC (mobile phone charger, mobile power, computer USB port can be powered) Shell material: metal aluminum anode blue Audio Input: 1. 3.5 Headphone Stereo Audio Input 2. RCA Audio Stereo Audio Input (TV, CD player, DVD player and other audio output can be input Bluetooth transmitter box) Pair Method: Turn on the power of the Bluetooth transmitter box, press the PAIR button for 3 seconds until the designated light red and blue lights flashing into the pairing mode alternately, this time you can turn on the Bluetooth receiver or Bluetooth speakers also enter the pairing mode ,Bluetooth transmitter box will automatically match ,The blue light flashes successfully. Tips: Bluetooth transmitter box can remember pairing four Bluetooth receiver box or Bluetooth speaker, while supporting two Bluetooth receiver box or Bluetooth speaker while receiving playback. .