The DoorSpy has magnetic sensors that detect if your door is opened and when triggered automatically sends you a text message*. This multi-function alarm is simple to operate and can be easily installed by any user in a home office store or warehouse. This device works with SIM cards** enabled with the following technology:
Global Systems Mobility (GSM). GSM technology was developed for effortless installation increased user mobility integrated telephony switched and packet data support facsimile and text messaging services.
Location Based Services (LBS). LBS convert geographical coordinates latitude and longitude to something meaningful to you. Assisted GPS (A-GPS). A-GPS overcomes the low data rate of conventional GPS and extends GPS coverage to indoor locations.
Assisted GPS (A-GPS). A-GPS overcomes the low data rate of conventional GPS and extends GPS coverage to indoor locations.