["brand new and high quality\nFeatures:\nSpeaker for protection board has features of starting delay of about 3 seconds, prevent for DC impact on the speaker when starting up. The for protection board has simple circuit, safe and reliable.\nfor Protection board uses three 10A high-power relays, which can be easily connected to various power amplifier boards.\nDual indicator lights display, one is the power indicator, the other is the switch indicator.\n\nSpecifications:\nWorking voltage: AC 12-18V, independent power supply is required.\nMaterial: Plastic \nSize: app.67x50mm/2.64x1.97in\nColor: As pictures shown\nQuantity: 1pc\n\nNote:\nNo retail package. \nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes:\n1 x for Protection Circuit Board (other accessories demo in the picture is not included.)"]