Introduction: B61 is a kind of Bluetooth music receiver for car. It is connected to car speaker/amplifier and mobile phone/tablet/computer by audio cable. It can transmit audio signal. Support calls, U disk playback. Product specification: Specifications: product name: B61 Wireless version: V5.4 frequency range: 2.402-2.480 GHZ Wireless Protocol: HSP HFP A2DP AVRCP connected devices: support one drag one decoding format: SBC nput Interface: AUX + USB U Disk Format: MP3/WAV/APE/FLAC Support Mode: Wireless. U disk Input Voltage: 5V/1A Model Number: Bluetooth 5.4 Receiver Connect: connect the power to the car USB, audio cable connected AUX interface, at this time the product blue flash into matching mode, open the phone bluetooth search''B61'' click to connect Bluetooth, connectsuccessful blue light long light. Mobile phone music can be played, plug-in U disk directly play music, call support. Feature 1: Bluetooth 5.4 Feature 2: Car Adapter Feature 3: Audio Receiver Feature 4: adaptador bluetooth Feature 5: bluetooth adapter 5.4 Feature 6: bluetooth usb Feature 7: bluetooth adapter Feature 8: bluetooth 5.4 adapter Feature 9: bluetooth usb adapter Feature 10: usb bluetooth 5.4 Feature 11: bluetooth adapter usb 5.4 Package includes: 1x Car Bluetooth Music Receiver Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.