The “Jack of All Trades” GPS. First off it comes preloaded with TOPO 100k maps with full coverage of the United States. The 655t has a big touch screen that you can use with gloves. Also has position reporting so you can let other Rino users know where you are. Other features include: waterproof, 2 way radio, weather radio, altimeter, and a built in digital camera. Hands down one of the best on the market!