[marin8703]

the only sensor the 5900 sst comes with is a shock sensor. many are comfortable with that, but i also had a sound sensor installed to protect against window breakage in teh rear incase the shock didnt pick it up.

550 sounds pretty good compared to mine. i paid about 750 but that included the sound sensor and the install for it, and also one of those scanner lights installed up front.

make sure to test that the starter is being disabled by the alarm if its not disarmed. at first delivery my installer had it hooked up somehow so that you could start the engine with the siren screaming, when i told him about it he fixed it up in an hour or so, had a bit of a tough time. also check proper instalation of the hood pin switch. this alarm is a somewhat time consuming install cauze theres alot of things to hook up, but if hes done an h3 before he be ok, i was the first for my installer. he broke a plastic trim piece and cut my gps antenna cable, but was real nice and ordered both of them for me.

test that all the features work for ya.