Set the cadence for your next outdoor ride with the Garmin Edge 305CAD personal bicycle trainer. Easy to install onto your bike stem or handlebars, this waterproof unit uses a SiRFstarIII receiver and a GPS antenna to keep you in the know about your pedal strokes per minute, distance, time, calories burned, altitude, climb, and descent. The backlit LCD screen informs you of up to eight different data fields at once as you race a virtual partner, try to match previous course records, or perform custom workouts you've created. Measures approximately 1-3/4" x 7/8" x 3-3/4". 1-year warranty.