Feature:1. Power On Delay and DC Protection: The speaker protection board is designed and manufactured with a special protection chip, with power on delay and DC protection, immediate shutdown function.2. PCB Double Sided Tinning: The speaker protection circuit board adopts PCB double sided tinning 1.6mm, excellent voltage regulator, and 7.02 connection terminal for audio source wiring.3. Fully Sealed High Current Relay: High power speaker protection board uses fully sealed 30A high current relay, suitable for high power amplifier, can control DC voltage 1500V, over current.4. LED Working Light: The speaker protection board has simple circuit, easy wiring, safe and reliable work. With LED work light indication, protection when off, normal work when lit.5. All Round Protection: Speaker protection circuit board provides all round protection for your speakers, so that your speakers can be used stably.Specification:Item Type: Speaker Protection Circuit BoardMaterial: PCBPower Supply: Within the range of 12V to 16V.Package List:1 x Speaker Protection Circuit BoardNote:Protection needs independent winding group power supply, can not share power with power amplifier circuit!