Functions: Tracks Scan, Time, Speed, Distance (Dist), Odometer (Odo), Calories (Cal), and Pulse.Pulse Monitoring: Includes the 3.5mm headphone-style jack for heart rate sensors.Compatibility: uses standard "headphone-look" cables common on most Amazon-brand indoor bikes (Sunny, Yosuda, Exerpeutic, Wenoker etc.). Ease of Use: Simple 3-button interface (Reset, Mode, Set). Indoor: rowing machine rower, elliptical, bikes. New in box.