Bluetooth Audio MP3 Player Decoder Module A7-004 with Buttons USB and SD TF Card Slot

Description :
A perfect Bluetooth audio receiver board for use. 
Built-in 3.5mm audio jack for audio output. 
Bluetooth 2.1 receive, can connect with the earphone and can also be used for power amplifier. 
USB interface, powered by DC 5V; with TF card slot. 
With 5 buttons for adjustment, convenient and easy operation. 
The transmission distance could be up to 10m (shielded signals). 

Specifications: 
Power Interface: Mini USB Interface 
Supply Voltage: DC 5V 
Audio Input: Bluetooth V2.1 
Audio Output Jack: 3.5mm 
Applicable Impedance: 4-8 ohm 
PCB Board Size: 50 * 40mm / 1.97 * 1.57in 
Weight: 11g / 0.39oz.