Fangrui Product Details [relay Box] - This 12v Relay Box Includes Total 6 Available Slots For Connecting, Can Make 6 Relays Connected Neatly And Tidily In One Box, Which Also Makes It Easy To When One Of The Relays Break Down. [fuse Block] - This Relay Block Also Includes 6 Fuse Slots For Relays, You Can Add Suitable Size Fuse To Corresponding Circuit To Protect The Device From Being Damaged By Excess Current, Which Provides Double Protection To Your Circuits. [pre-wired] - This Relay Fuse Box Is Pre-wired Design, And The Wires Are Connected In Different Colors For Easily Clarify And Connect The Wires. In Addition, The Wires At Relay High Power Side Are 12 Awg Wires, Which Makes The Whole Box Much For Large Current Use. [waterproof Dustproof] - This Fuse Relay Block Includes Upper Cover And Bottom Cover For Use, Which Can Block Out Most Dust Or Splashing Water From Entering , Enhancing The Security Level When Used. [application] - The Relay Holder With Fuse To Make The Wiring Clean And Tidy, Which Is Suitable For 12v U