Lookatool Wireless Bluetooth Music Transmitter 3.5mm Stereo Audio Adapter Applicable scenario: bluetooth headset Bluetooth stereo MP3 TV computer DVD, etc. Launch range: effective diameter range around 10 m. The bluetooth specification: 3.0. Lamp:yes. The power supply 5 v power supply products: USB interface. Audio interface: 3.5 headphone jack. Product size: 15.5 * 10 * 2.5 cm.