
A radio signal car pager alarm will usually have a range of at least 1 mile and can work up to 3 miles depending on the local terrain, a basic system will have an audible bleep but you can get key fobs with mini LCD displays where icons tell you which sensor or zone has been triggered. Radio car pager alarms are available as a complete package or you can connect an output from an existing car alarm to a radio page accessory.
An SMS text message car pager alarm is more costly then a radio pager but there is no range limit except where there is no mobile phone signal. Mobile phone car pager alarms can function interactively, you can send a text message command to the car to immobilize the engine when it stops at a junction or lock doors, close windows, siren and hazards on and even operate a smoke box.
A car pager alarm accessory will have an input connection which connects to an alarm output so when the alarm is triggered a signal is sent to the pager to transmit a radio signal or dial up and send a text message. All SMS text message car pager alarms require a SIM card; this can be pay as you to keep costs down.
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