Doc, the ESP1000 is a great alarm and I agree with laminge it is a better system with the ultrasonics. Should only be an extra $ 100 to have included. The Pager available for the unit up here sells for $ 220.00 and has a range of 3km's. It does not need to go through a paging service and operates directly from your vehicle to the paging unit. If you have a power aerial when the alarm is activated the aerial extends and transmits the signal back to the pager. As i said before it is a great alarm.