The advanced wireless cadence sensor in the Polar CS200cad Cycling Heart Rate Monitor measures your pedaling rate as RPMs and measures your current, average, and max speed. This means you can train to increase speed while keeping your heart rate in a specific zone. Arrows on the CS200 let you know when you're above or below your average speed, and the automatic display scroll switches the information according to your preferences. Polar OwnCal tracks your energy expenditure during your session and shows past sessions, and the cycling economy feature lets you foresee your calorie expenditure so can bring enough fuel along. *Included bike mount, multifunctional handle bar/stem installation, speed sensor installation for different fork shapes. Product Features Material: Altimeter: No Barometer: No Heart Rate Monitor: Yes, Polar OwnZone guides you through individual exercise zone Chronograph: Yes, automatic lap recording up to 50 laps Thermometer: No Digital Compass: No Adjustable Declination: No Low Battery Indicator: Yes PC Compatible: Yes, transfer exercise data from unit to via Polar WebLink, edit wrist unit settings with Polar UpLink Tool Waterproof: No, water-resistant to 10m Backlight: Yes Alarms: Visual and audible alarm in target zones Battery Type: Battery Life: Size: [Not Exact] 2 x 2 x 1in (5 x 5 x 2.5cm) Weight: Recommended Use: Training, cycling Manufacturer Warranty: 2 Years