With this fuse adapter tap kit, you can easy to add a extra power or connection to the fuse box without cutting the wire. Dual-slot Fuse Holder provides one fuse holder to protect existing circuit and a second fuse holder to protect new circuit. Wide Range of Uses, suitable for Car Alarms, GPS, Car Recorder, Cell Phone Charger, DVD Player, Satellite Radio, etc. Installing Method: 1. Disconnect Power Source. 2. Select and remove a fuse in your vehicles fuse box which with constant or switchable power capabilities that matches the power requirements of the accessory you are adding. 3. Insert new accessory fuse into added slot. 4. Install Add-a-Circuit with the newly added fuse installed , back into the fuse block. Reconnect power source, Turn on Ignition to test new accessory for proper operation. Note: If you find that the fuse is difficult to insert or remove, please use tool to gently tap in or pull out. Package Contents: Add-a-circuit Fuse Adapter x 10pcs3 x low profile mini add-a-circuit fuse adapter 4 x mini add-a-circuit fuse adapter3 x standard add-a-circuit fuse adapter Blade Fuse x 10pcs3 x 5Amp low profile mini blade fuse 4 x 15Amp mini blade fuse 3 x 5Amp standard blade fuse