Car Bluetooth Audio Receiver/Adapter - Black.

Product parameters:
Product material: plastic + metal
Product color: black
Interface type: 3.5mm
Blue version: Blue 4.1
Special features: support one for two, support to connect headphones, connect mobile phones, connect speakers, connect cars
Product size: 5.9 * 1.5 * 1.2cm
Product bare weight: 12g (Blue receiver + metal adapter)
Total product weight: 25g (Blue receiver + metal adapter + cable + manual + PP bag packaging)
Product packaging: sealed PP bags
Product function: Blue receiver, car Blue receiver, car Blue receiver, AUX Blue receiver, audio adapter
Working current:State parameter (4.00V) parameter (3.40V)Operating rated voltage 4.00V 3.40VPaired state current 4.33mA-20.56mA 4.47mA-22.03mAStandby current (Blue connected) 0.43mA-8.31mA 0.41mA-8.74mAMusic playback current 19.04mA-23.21mA. 22.85mA-23.74mACall current 23.82mA-24.05mA 25.19mA-25.78mACharging current 100.0mA. 100.0mAShutdown current 1.4uA 1.1uA
system status:
Power on and off: MFB long press for 3 seconds
Volume up: short press VOL +
Volume down: short press VOL-
Switch language: Double-click and hold MFB in pairing state (red and blue lights flashing)
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 a call: Short press MFB when you call
Rejected call: long press MFB when calling
Unnumbered redial: double-click the MFB button, then short press MFB to cancel the dial out

The led light shows:
Boot pairing: red and blue lights flash alternately
Connection status: blue light flashes slowly (1 second in 5 seconds)
Low voltage: flashing red light (0.5 seconds 1 time)
Wireless Car Bluetooth Receiver 3.5mm AdapterCar Bluetooth Audio Receiver/Adapter - Black.Car Bluetooth Kit Wireless Music Audio Receiver.