The heart rate monitor chest strap is an adjustable replacement strap fits for Garmin,for Polar H7 strap,for Wahoo TICKR strap, for CooSpo strap . Specifications: A).Belt length: Small-Medium-Large; B).Material: Nylon + Spandex. C).Color: Black,Gray, Orange,Red,Pink,Light Blue, Sapphire; 2. Features: Soft elastic strap provides a comfortable fit. Easy to use, clean, durable, highly efficient and stable. Soft fabrics and adaptive electrodes make it extremely sensitive to your heart's electrical signals. 3. Instruction： 1).Wet the sensors on the inside of the strap. 2).Attach your heart rate monitor transmitter to the strap. 3).Attach the strap around your chest. 4).Make sure the monitor sits above the base of your chest bone. 5).Package Included: Chest Belt StrapS (only strap not including transmitter)