CalAmp LMU-2620 offers the following interface for connection to external devices: 5 digital inputs, 3 digital outputs, 2 analog inputs and as an extra feature you can add the 1-Wire interface to manage Driver identification in your field service management or connect a temperature sensor. If you do not need real-time GPS tracking for your vehicle on your service routes or deliveries tasks and automatic vehicle dispatch you can program the LMU-2620 GPS tracker to only send SMS alerts to a predefined mobile phone.