If you do not need GPS location of your service routes or deliveries tasks in real-time and hours of service control, you can program LMU-600 of CalAmp to periodically send SMS alerts to any changes in the device event and receive these alerts in a predefined mobile phone. The interface for connecting external devices in the GPS tracker CalAmp LMU-600 is as follows: 1 digital input, 1 digital output open collector (150mA) and 1 analog input, it also allows you to configure the inputs as Panic button for sending emergency alerts in their automatic vehicle dispatch. In addition CalAmp offered as an accessory for LMU-600, a relay to interrupt the starter motor in any field service management task and a cable to install the OBDII port.