ITEM NAME:Mini USB Wireless Bluetooth V4.0 Audio Stereo Music Receiver Adapter AUX IO FT Instructions: 1. Power connection: plug the bluetooth audio receiver and USB head into the DC 5V power supply. Such as: 5V power adapter, power supply from USB port on speaker, power indicator light will be on (this current only needs more than 100MA to start). 2. Audio cable connection: one end of the audio 3.5 connector is connected to the AUX port of the audio device, where the audio cable connection can better ensure that music will not be distorted or delayed during transmission. 3, pairing: turn on the Bluetooth function on the phone --> search Bluetooth--> connects Bluetooth--> is paired with the device --> is connected to the media --> is paired successfully 5 music appreciation: turn on the music player on the phone --> plays your favorite song --> receiver receives the signal --> speaker plays beautiful music Technical parameters: 1. Working voltage :DC5V 0.5v 2. Large working power: 0.3w 3. Transmission distance: 10m 4. Bluetooth version: V4.0 5. Sound channel: vertical sound channel 6. Working frequency: 2.4ghz search Bluetooth.Bluetooth version: V4.0. Audio cable connection: one end of the audio 3.5 connector is connected to the AUX port of the audio device, where the audio cable connection can better ensure that music will not be distorted or delayed during transmission.