1. 4-pin SPST (Single Pole Single Throw) relay.2. Built-in fuse base with included 30A blade fuse and 14AWG wires.3. 30A high switching capacity.4. The metal mounting plate on the relay is easy to install.5. Universal for cars and devices equipped with a 12V DC power supply.Specification:The SPST 12V 30A relay has built-in 30A ATO/ATC blade fuses. The integrated fuse holder on the relay eliminates the need for a separate fuse holder in the circuit, saving space and money. When you buy this relay, in addition to the built-in fuse, relay wiring is also included, which has a locking function that allows multiple relays to be combined. The kit includes 6 relays, 6 relay wiring harnesses, and 6 blade fuses. Features: 4-pin SPST (Single Pole Single Throw) relay. Built-in fuse base with included 30 A blade fuse and 14 AWG wires Easy to install.Universal for cars and devices equipped with a 12V DC power supply.Specification:Supply voltage: 12VRated current: 30AWeight approx. 390gWiring: Black - Ground (85), Red - VDC (30), White - Trigger (86), Blue - Output N/O (87)Package list:6 x Relays6 x Relay wiring harnesses6 x Blade fuses