Dimensions: 1.7 x 1.8 x 0.7", precisely locate indoors and outdoors, able to prevent theft of vehicle, cargo and strong box, and monitor and protect the old, children and pets, and covertly track.It is a server-based service, more advanced technology than GPS. It positions and tracks various remote targets or objects in combination of the signals of CDMA (800/1,900MHz) base station and GPS satellite. User can get the position information via message or Internet. Advantages:1 Locate precisely indoors and outdoors: locate easily and precisely in the place covered with CDMA signals, such as in car trunk, elevator, basement with the precision of outdoor 5 to 20m, indoor 50 to 200m2 Slim, integrated designed (built-in antenna and battery, 40g), hide and carry easily3 Low consumption, with a long idle state of 20 to180 days (depending on the working mode)4 Covert warning, remote monitoring and surveillance5 Search conveniently and automatically: search the targeted object via message and InternetApplications:1 Guard against theft of strong box, vehicle and outdoor equipments and track cargo2 Monitor and protect children, old and disabled 3 Provides peace-of-mind for businessmen4 Manages the on-errand personnel5 Tracks criminals secretly producing area:China payment:T/T, L/C supplying capacity:100,000pcs/month