ZK-3002T Bluetooth Digital Power Amplifier Board 300WX2 2.0 Channel Stereo HiFi Preamplifier TPA3225 1. Made of high-quality materials, durable and practical 2. High power fever 2.0 Bluetooth amplifier board with high and low frequency adjustment 3. High current, low magnetic loss, small parasitic capacitance, and low heat generation; The magnetic shielding mechanism has strong anti electromagnetic interference EMI performance 4. Thickening the heat sink is the first step to solve the heat dissipation problem in order to leverage the advantage of high power 5. parent sound, fast low-frequency response, strong mid frequency texture, high frequency smoothness, and minimal tangent loss Product model:ZK-3002T Working voltage range:18-50VDC, limit 53V Adapted power supply:It is recommended to use a DC power supply with a voltage of 36-48V and a current of 10A or above Maximum power:single circuit 300W@50V , 4 ohm; 160W@50V , 8 ohm. The higher the voltage, the smaller the resistance, and the greater the output power Bluetooth chip:Jerry 5.3, mission distance 10 meters Input method:Bluetooth+AUX+USB drive/sound card Number of channels:2.0, left channel+right channel Power amplifier chip:TPA3255 Protection mechanism: Input undervoltage, overheating, overcurrent, short circuit protection. No input anti reverse protection, positive and negative poles cannot be reversed!!! Type:A:Potentiometer integrated 3002T/B:Potentiometer external type 3002T Colour:Black Material:Plastic Package Contents: 1 * Digital Power Amplifier Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.