Usage Tips:The radiator as shown in the finished board strip diagram may not be enough in actual use at medium to high power. You can install a radiator according to your actual usage.Can be used with 300W pure copper wire toroidal transformer.High and low voltage power supply.Power supply voltage: AC dual 24-36V, transformer power recommended to be above 300W.Output power: 200Wx2Impedance:4-8OhmNote:Due to different production batches, the appearance is different, which does not affect the use.Colour:Green & BlackMaterial:PCB+electronic components+MetalPackage Contents:1 * Power Amplifier BoardOnly 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.