The Magellan Cyclo 315 HC is a powerful cycling GPS computer designed for the serious cyclist. It comes with a vibrant color screen that is easily read in direct sunlight, rugged and water resistant to IPX-7 standards. It includes cable ties and out-front mounts and has a simple interface with large buttons for gloved hands. The Cyclo 315 HC model is compatible with Shimano's Di2 electronic road bicycle shifting systems with the Di2 Wireless Unit (SM-EWW01) featuring the Shimano D-Fly Data Management system. Surprise Me feature suggests up to three (3) different routes after entering distance or time criteria Support for over 130 ANT+ speed, cadence and heart rate sensors Compatible with Shimano Di2 electronic road bicycle shifting systems with Di2 Wireless Unit featuring D-Fly Set includes: GPS, battery, out-front mount, charger, USB cable, heart rate monitor manual Brand: Magellan Model: CY0315SGHNA Materials: Plastic Color: White Dimensions: 2.40 inches long x 4.06 inches wide x 0.74 inches high Weight: 0.28 pounds Color: White. Gender: Unisex.