Instruct: Classify Amazon reviews into positive or negative sentiment
Query: poor service

I bought this to install on the rear of my 31'fifth wh. camper. It didn't work wireless so I bought 75' of cable and that didn't work either. After several attempts to contact the service I finaly spoke to a "person". He said the mod. 300 camera wouldn't work and he would send a mod. 330. This took 3 months with lots of calls and when I hooked it up and it still doesn't work. Works fine on the rear of my car wireless.Poor serv ice and forget the web site help service. Mike Rumsey