GPS car alarm system/gps tracking device,car gps alarm tracker 4 band GSM compatible with original ... Holux or Royaltek, L1, C/A code,1575.42MHZI/OInputsEmergency Button, 2xLow Level Voltage, 2xHigh Level, ACC, Engine, Door Open, Brake ... sensor, fix bar, and RS232 connected device Intelligent GPS car alarm system/gps tracking device/ car gps alarm tracker RS3000B1/C1,support ...