Bluetooth 5.0 - 3.5mm Jack Receiver Aux Audio Receiver Adapter

3.5mm Jack Bluetooth 5.0 Receiver Aux Audio Receiver Adapter For Phone Headphone Wireless Music MP3 Bluetooth Car Kit Adapter
product manual:
 
Bluetooth version: Bluetooth 5.0
Interface type: 3.5mm
Battery specifications: 70mah rechargeable lithium battery
Product size: 5.9*1.5*1.2cm
Product bare weight: 12g (Bluetooth receiver + metal adapter)
Total weight: 25g 
Product features: Bluetooth receiver, car Bluetooth receiver, car Bluetooth receiver, AUX Bluetooth receiver, audio adapter
 
basic skills:
Voice prompt: support
One for two: support
Pairing timeout shutdown: The pairing state lasts for 5 minutes and then shuts down.
Low battery reminder: when the voltage is less than 3.2V, reminder once every 5 seconds, 3.1V shutdown
 
system status:
Power on and off: MFB long press for 3 seconds
Volume plus: short press VOL+
Volume minus: short press VOL-
Switch language: Double-click and hold MFB in the pairing state (red and blue to flash)
 
Music control:
Play pause: short press MFB
Previous song: VOL - long press for 2 seconds
Next song: VOL+ long press for 2 seconds
 
Telephone control:
Answer the call: Short press MFB when calling
Refuse to answer the phone: press MFB when calling
Redial without number: double-click the MFB button, then short press MFB to cancel the dial-out
 
Led light shows:
Boot pairing: red and blue lights alternately flash
Connection status: blue light flashes slowly (5 seconds 1 time)
Low voltage: red light flashes (0.5 seconds 1 time)