Garmin Edge 305HR, Speed & Cadence Take your ride to the next level with the Edge 305 - Garmin's GPS-enabled, personal trainer and cycle computer. From competitive road racing to mountain biking, the cyclist-friendly, lightweight Edge will help you achieve your personal best. With the easy-to-use Edge 305 on your bike, you'll always know where you're going and how far you've gone. The Edge 305 HR, Speed & Cadence Package comes with a heart rate monitor and/or wireless speed/pedaling cadence sensor to provide valuable feedback. In addition, the Edge 305 Package incorporates a barometric altimeter for extremely accurate elevation and vertical profile data. Recreational cyclists looking for the perfect touring companion and fitness partner will love the Edge 205. The Edge 305 HR, Speed & Cadence Package has the ability to measure pedaling cadence, heart rate, speed, distance, time, calories burned, altitude, climb and descent, plus much more. Edge 305 HR, Speed & Cadence Package features include: A Easy-to-installAno calibration required. Just snap it in the included bike mount and go A High-sensitivity GPS receiverAknows your position even in tree cover and canyons, making it extremely reliable for navigation A Highly efficient ANT wireless protocol provides superior battery life and reliably transfers your performance data to the Edge 305 A Customizable cycle computerAshows up to eight different data fields for continuous feedback A Virtual Partnera{cent}Alets you "race" a virtual competitor, making training fun A CoursesAlets you "race" against a recorded course to try to match previously set speeds at every point along the way