Extended Description Our NEW Mars GSM Dialler offers a quick and simple way to upgrade a traditional 'bells only' alarm system to a communicating alarm system or monitor stand alone equipment or detectors via the GSM mobile phone network. This compact SMS text and speech alert module which will send a user programmable SMS text message and a 6 second programmable recorded speech message to a maximum of four recipients when any of its two volt-free digital inputs are triggered. This unit also supports communication to a central station in Contact ID format. Powered by 9-30v DC the Mars GSM is ideal for remote applications where you need to be informed if there is an alarm condition or a problem on a remote site without the need for a fixed phone line. Configuration and installation is simple just program via the USB port with the provided software and lead, insert SIM card and connect just the minimum of 3 wires and the next time the inputs are triggered the SMS text and or speech message is sent. There is also an output that can be remote controlled by calling the unit or by SMS text Message. The unit can also forward incomming low credit messages from the network operator. Supplied Unboxed with mag mount antenna. Uses pay as you go or contract SIM on Vodaphone, 02, Orange or T-Mobile Configuration and installation is simple just program via the USB port with the provided software and lead, insert SIM card and connect just the minimum of 3 wires and the next time the inputs are triggered the text message is sent and a 'site listen in' channel is opened (optional microphone needed). There is also an output that can be remote controlled by calling the unit or by SMS text Message. Supplied with a Handy DIN rail mountable box. Uses pay as you go or contract SIM on Vodaphone, 02, Orange or T-Mobile Price £229.99