SPALSAT is a GPS/GSM interactive tracking device that communicates the status of your vehicle via your mobile phone (SMS) or land based telephone (voice activated menu). SPALSAT can be linked into a vehicles existing security system. The unit is activated or de-activated when arming or disarming the vehicles alarm (either from an Aux. Output, hazard lights or door pin switches). No ongoing subscriptions required, just pay for SIM card (not supplied)