I bought these to better control the current flow to the Dash Cam. I have a 4K U1000 with low power radar and a 2K DVR on the back. At maximum power, it consumes about 0.5 amps. This tin box is supplied with 5 micro 2 5 amp fuses. Worked great with my Eaton Bussman fuses on my 2020 Ford Ranger Lariat!