6 Controlling Switch M-858S-V2.0 Bluetooth 4.1 Multifunctional Decoder Board 4.1 Amplifiers Circuit Board 3W 3W Speakers Decoder 5V Subwoofer Amplifier Board Audio Circuit 5V Bluetooth Mp3 WAV Microphone Mic USB SD Card Power

Features:

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

Specifications:

• Product name: Amplifier Board
• Micro USB Socket Power
• SD Card System
• USB Port
• Chip Model: M-858S-V2.0
• 3.5mm Audio Socket
• Board Size: 62x52mm

Application:

• Modified speaker
• Amplifier equipment
• Car Bluetooth device