Garmin Edge 605 Water Resistant Cycling GPS. The Edge 605 automatically measures your speed, distance, time, calories burned and altitude. It also comes pre-loaded with a built-in base map, and a MicroSD card slot you can use to load new maps or store workout, course and ride data. The Garmin Edge 605 will interface wirelessly with any devices that are compatible wiht the "ANT + Sport" protocol, including devices from other manufacturers.