Had a Kdlinks X1 cam on a 12v adapter for 2-3 years. I bought the harwire kit and add a fuse as the same time. It sat on the shelf for 3 years. Today I just decided to give it a shot and installed it correctly up the pillar and down the mirror wire shroud. Took all of 20 mins including soldering/heatshrink the add a fuse to the hardwire kit lead.