The Equine H3 sensor belt set is a wireless fabric sensor that fits easily around your horse. It's ideal for measuring heart rate for longer periods of time, for instance when trotting and lunging your horse. Includes H3 heart rate sensor and adjustable fabric strap. Unique training benefit feature provides instant feedback after your workout Helps you train at the right intensity and improve your run with personal sport zones and the Running Index feature Compatible with s3+ stride sensor for running speed and distance, cycling CS speed and cadence W.I.N.D. sensors and the G5 GPS sensor Slim silicone wristband wipes clean and is designed specifically for female wrists