I use a wired one. its not that difficult to run the wire underneath the body and I have had to replace the camara 3 times because of the rainy season here. each time I just reused the wire. all were "waterproof" camaras

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)