3pcs Audio Speaker Protection Board Amplifier Components DC Protect Kit DIY

Specification: Input voltage: AC12-15 V Size(L*W*H): 6x 4 x 2.5 cm (Finished) Feature: With power on delay (about 3 seconds) and DC protection (control voltage around 1 V) With LED status display, when the protection light, the normal work time off Using 15 A large current relay Working voltage aAC 12 to 15 V, need independent power supply. Package includes: 3 x Double-sided circuit boards 3 x 4148 12 x Capacitor 18 x Transistor 15 x Metal film resistors 3 x Bridge Rectifier / three-terminal regulator /each 3 x LED (light emitting diode) 15 x erminal Block 6 x 15A Relay 3 x Kit assembly instructions