Uses TPA3116 Electrolytic capacitors use fever capacitors Resistors use high-precision chip resistors to a good signal-to-noise ratio for the whole machine PCB uses 1.6mm thick double-sided board, 2.0 ounces copper thickness, tin-spraying full process to good passing performance of large and small currents Made of high-quality materials, sturdy and Material: PCB Color: As Shown Voltage: DC 24V 10A Potentiometer distance: 25MM -25MM-25MM-25MM Input signal: 2.0 stereo Output: 100W x 2 +50W x 4 (Due to different batches, product parts and printed words , but not affect use) Package Contents: 1 x 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.