The Pentax WG-3 GPS features built-in GPS (obviously), an image-stabilized 16MP CMOS sensor, and an F2.0-4.9 lens with 25-100mm equivalent zoom. It is waterproof down to 45 feet, drop-resistant from heights of 6.6 feet, dust-resistant, and can handle temperatures down to 14F. Finally, it's back-pocket-safe, meaning you can sit on it and it's still likely to work (the WG-3 can handle up to 220 pounds of pressure).