DeLorme Earthmate LT-40 GPS [OLD VERSION] Support for Ultra-Mobile Personal Computers (UMPCs) laptop PC, PDAs, and touchscreen phones USB-powered GPS receiver includes super-high sensitivity STMicroelectronics GPS chipset; DeLorme ConstantLock technology for superior signal retention in challenging GPS environments NavMode with optional 3-D perspective and larger, more accessible user controls Voice-guided navigation, automatic back-on-track, GPS Radar to locate travel services, and other top-end features Locate over 4 million places of interest; create routes automatically; calculate fuel usage and costs, and GPS-navigate with total confidence anywhere in the U.S. or Canada, and on major roads in Mexico