... lock system kind of sensor RS3000B1 is one kind of intelligent GPS two way car security system/car alarm system/vehicle alarm ... , ACC, Engine, Door Open, Brake , 2x A/D (10bit digital,5V,12V,24V,30V optional) OutputsOil and electricity control, sound ... monitor, fuel level/temperature sensor, fix bar, and RS232 connected device Intelligent GPS car alarm system/gps tracking device/ car gps alarm tracker ...