ZK-302T 2.0 30WX2 BT Audio Power Amplifier High-Power Output Multiple Protections User-Friendly Design with Customizable Sound Quality Convenient U Disk Playback and Power Management Name: Power Amplifier Material: Printed circuit board and metal BT version: 5.1 Power output: left channel 30W and right channel 30W Audio input: BTandAUXandUSBandUSB soundcard Adaptive powersupply: 9-24 V, andge 3A (No AC connection) Protections: overheating, overcurrent, short circuit, antistatic Characteristic function: Support APP function. Modify the BT name, password setting, volumes adjustment of prompt tone, on or off prompt tone, sleep aid song, sound effect selectionandcustom sound effect, and U disk playlist Adapting horn: 10-50W 4-8andOmega Item size: 60 x 76 x 20mm or 2.36 x 2.99 x 0.79in Item weight: 61g or 2.15ounce Package size: 115 x 70 x 50mm or 4.53 x 2.76 x 1.97in Package weight: 106g or 3.74ounce