Product Specifications Product Name: Integrated Microphone and Speaker Product Model: -502T Chip Model: TPA3116D2 Bluetooth Transmission Range: 15 meters Input Method: Bluetooth + AUX + USB Input + MIC Number of Channels: 2.0 Channels (50W + 50W) Speakers: Left and Right Channels: 20-50W, 4-8 Feature: Dual Microphone Input Compatible Power Supply: DC 12-24V/10A (Not suitable for AC power connection) External Leads: 4 pairs of 30cm cables Protection: Overvoltage, undervoltage, overheating, DC detection, short-circuit protection Dimensions: 70mm x 60mm x 15mm Weight: Approximately 170g (including packaging) When the audio signal input is strong enough and the power supply voltage/current are sufficient, the output power be sufficient. The higher the power supply voltage, the greater the output power; the lower the speaker impedance, the greater the output power. Please that the power supply capacity exceeds the actual operating power of the amplifier. Color: Black Material: PCB+Metal Package Contents: 1 x 50W+50W Audio 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.