Built-in 2x30W stereo Class D amplifier Short-circuit, Overheating, and Overloaded Protection Supports wireless Bluetooth 3.0 and USB/SD playing Supports Voice Recording and Digital Volume Control 1 AUX and 1MIC input, 1 AUX output for power extension Remote Controller for convenient use 12-24V DC Power Adapter (Included) Portable, Robust and Durable Aluminum housing