Car Alarm Paging - Car Alarm Paging are designed to let you know if your car has been broken into or stolen even if the siren is out of earshot. A radio pager will transmit a warning radio signal to a key fob and an SMS Car Alarm Paging will send you a text message to your mobile phone. A radio signal car pager alarm has a range of approximately 1 mile and can sometimes work from up to 3 miles depending on the local terrain. A basic car alarm paging system will have an audible bleep but you can get key fobs with small LCD screens where icons tell you which sensor or zone has been triggered on your car alarm. Radio car pager alarms are available as a complete package or you can connect an output from an existing car alarm to a radio paging accessory. SMS text message Car Alarm Paging have an unlimited range except in areas where there is no mobile phone signal. It can function interactively letting you send a text message command to the car to stop the engine as soon as it pauses at a junction, or you can lock the doors, close the windows, or even switch on the siren and hazards.