ITEM NAME:12-18V UPC1237 PC Speaker Protection Board Loudspeaker Protection Board EKJ Descriptio n Description: Can withstand power: 50W-300W Operating voltage AC: 12-18V, requires independent power supply Specifications: Material: Metal + PC Colour: Black Model: UPC1237 Size: 68*55MM Package Included: 1* PC Speaker Protection Board Note: It is not suitable for BTL circuit. Speaker protection requires independent winding power supply, and cannot share power with other circuits. We offer you what you need! 12-18V UPC1237 PC Speaker Protection Board Loudspeaker Protection Board Kit.Model: UPC1237. It is not suitable for BTL circuit. 1 PC Speaker Protection Board. We'd like to settle any problem in a friendly manner. Can withstand power: 50W-300W. We want to make sure you are happy with our item.