The Cateye V3N Computer is a feature packed wireless cycle computer with a heart rate monitor, speed sensor and cadence sensor. The V3N provides all the data you need to measure your performance and get the most out of every ride. Features: Wireless mounting and operation for a tidy, cable-less fitHeartrate monitor, cadence and speed sensors included2.4 GHz wireless operation for instant data display3 line display shows all your data for convenient viewingDisplays heart rate, calorie consumption speed, cadence and time with peak and average readingsRecords lap times, total distance and distance remainingBacklight for night time operationBattery life: Approx 1 year based on a hour of use per dayWeight: 66g (includes head unit, heart rate monitors and sensors)