Built-in 2x30W stereo Class D amplifier 4-160 speaker output Support wireless Bluetooth 3.0 and USB/SD input Support voice recording function in AUX mode 1 AUX input and 1 AUX output for power extension With remote controller for convenient use Aluminum-alloy casing, small size and portable 12-24V DC power supply for safe use With hooks at the bottom for wall mount installation