The 773 is a generic GSM communicator that can be used to interface with a vehicle alarm, immobiliser or fleet management systems. The system is configured via a mobile cellular phone and if triggered will relay a message to a remote control station or mobile cellular phone. The unit is extremely small (20mm x 70 mm x 45mm) and is supplied with an onboard 1 Amp Hour Lithium Ion Battery. The unit has 6 configurable inputs and outputs.