【Parameter】12V 4pin waterproof relay automotive (max 14V). Note: 12V and 14V are coil voltages, they are not the voltage that triggers the switch 【APPLICABLE TO MANY FIELDS】 4pin 12V 30/40A waterproof relay used in led work light, fog lamps, starter, wiper, fans, speakers, central locking.alarm, electric windows, etc. 【Pure Copper Coil】:Excellent waterproof performance, The black shell is made of nylon material, which is electrical insulation,Internal use of pure copper coil, conductive performance is strong, low loss rate. Precision design makes electricity more secure. which can withstand cold and hot condition. no deformation and rust, perfectly made for long-term use. 【Easy to install】Pre-wired Harness - Heavy duty 16/14 AWG wiring harness. Black - 16AWG Pin85, Red - 14AWG Pin30, White - 16AWG Pin86, Yellow - 14AWG Pin87a, and Blue - 14AWG Pin87 【Package Includes】2Pack * 4 pin 12v 30/40A relay 4Pin 12V 40/30 Amp Waterproof Car Relay Switch Harness Set 12V DC 4Pin SPDT Automotive Relays 14 AWG Hot Wires