This Real Time CDMA unit is distinctive from other Real time tracking system, 1st is its Very small fits in the palm of your hand easy to conceal on your person or in a vehicle the unit does not need to see the sky to work 2nd is that it works in location were other trackers wonft like inside buildings or parking garages. How does it do this? By using Cellular assist. Plans start as low as 19.95 What is Cellular Assist when GPS Signals from any of the 24+ satellites can't be found the unit asks for assistance from cellular signals using GPS Triangulation mode. In this mode the unit determines its position through triangulation of the cellular towers. Weighs only 2.66oz Who would use it Executive protection, true asset tracking, child locates, vehicle tracking. See Specification sheet for rate plans Available accessories: Waterproof case Waterproof case with magnetic mount 21 Day battery pack (Coming Soon) Specifications: Rechargeable batteries 9 days (using 18 reports a day) CDMA 2000 1XRTT with QUALCOMM gpsOne technology Not Water Proof Simple LED status indicators for power & battery condition Internal Antenna Dedicated customer service lines & email support are available for customers during business hours. Price Plans (3 Month, 6 Month, & 1yr Contract Terms Available) Prepaid at activation. Includes: Real Time GPS Unit AC Charging Adapter Belt Clip User Manual Size: 3.1" x 1.8" x .8"