HiLetgo Mini Stereo AMP Audio Amplify Board Digital Portable Ampli Module 10W+10W Dual Channel Amplifier Class-D 12V DC Adopts Pam8610 chip, No filter, low static current, EMI, power consumption and heat generating With 5 5 DC outlet as power supply interface; high efficiency of 90 percent With LED power supply indicator, power supply switch and mute switch, easy to operate Operating Voltage: DC7 5-15v, recommended power supply: DC12V With over-current, temperature, short-circuit protection, hence safe for use