The 26 models were supplied with maps on a CD plus a 128MB CF card. They had a reversing light sensor, speed sensor, and angular direction sensor, to boost the system's accuracy, plus dead reckoning capability.
2720 was the base and 2730 added XM radio, FM transmitter, and MP3 player functions. i3 released in August 2005 had a 2.1" 176x220 color display and the i2 released in October 2005 had a 2.1" 176x240 monochrome display.Maps were loaded from DVD to the 128MB Micro SD card.The devices used 8MB or 16MB cartridges, onto which mapping data was loaded from the user's computer, at a chosen detail level (8MB covered the Atlanta Metropolitan Area at high detail, or a greater area at highway-level detail).The successor model was the Street Pilot III in 2002, which had a 3.85" 305x160 color screen and added voice prompts.
The c310 and c320 models used a 128MB SD card and the C330 model had the maps in internal storage. It was released in August 2005, adding FM traffic and text-to-speech capabilities to the C330.
The 27x0 models used an internal-memory storage and offered a 3.7" 454x240 color screen, spoken street names and FM traffic receiver.