Easy to install/no wires, just stuck the adhesive backing to the frame. Only drawback is that when the battery is depleted, you have to replace it. I have abut 30 hours on the meter, but s far it has worked flawlessly.
This installed very easily, it even has slots you can run a zip tie or safety wire through for extra security. The adhesive stuck to my frame really well, and there are no wires to attach. A little more money than other hour meters, but worth it.