1. It adopts a plug-type free combination fuse box, suitable for 4 Pin or 5 Pin bosch relays, and a 15-slot ATC/ATO fuse holder design, which can realize more wiring methods and uses. 2. The box body is made of nylon, with an upper cover and a lower cover, which is waterproof and flame retardant, durable and resistant to disassembly. 3. The detachable relay and fuse slot design makes terminal installation simple and convenient. 4. Maximum voltage: 32V 5. Maximum current: 40A 6. Temperature control range: -32 degrees Celsius to +120 degrees Celsius