... .42MHZI/OInputsEmergency Button, 2xLow Level Voltage, 2xHigh Level, ACC, Engine, Door Open, Brake , 2x A/D (10bit digital,5V,12V,24V,30V ... discarding, GPS antenna short circuit, GPS antenna open circuit, GPS receiver failure, illegal ignition, illegal door-opening, Voltage Analog Input, Low battery ...