V09103 Bluetooth Audio Receiver Amplifiers Board Micro USB 5V 3.5mm Audio Socket SD Card USB Port Dual Speaker Stereo Audio With One Volume 

Features:

• Width work voltage range
• Wireless Bluetooth control
• Knob adjustment
• Support reverse connection protection
• Support lithium battery charging
• Automatic re-connection

Specifications:

• Product name: Bluetooth Amplifier
• Micro USB Socket Power
• SD Card System
• USB Port
• 3.5mm Audio Socket
• Bluetooth
• Board Size: 58x42mm

Application:

• Modified speaker
• Amplifier equipment
• Car Bluetooth device