Comfortable and adjustable elastic strap With the chest strap based on high quality material, it can be attached to your skin closely Soft fabrics and adaptive electrodes make it extremely sensitive to your heart's electrical signals Utilizes the snap attachment method Compatible with different heart rate sensors (ANT+, Bluetooth 4.0, 5.3K) Suitable for Polar, for Wahoo, for Garmin, etc products Suitable for Geonaute Polar H3 H7 M400 v800 Wearlink M32 etc, for Wahoo Tickr Garmin 520, for Magene move, for Bryton, for Coospo, for Bryton 530, for Garmin HR, for Garmin ant+ sensor, for Wahoo TICKR or TICKRx, for Garmin forerunner 610, for Coospo h6, for Bryiton 330, for Polar H3, for garmin HRM-Run, etc. Total Length: Approx. 100cm before elastic (elastic and adjustable to fit different body size) Two snaps Distance: Approx. 45mm (please check the distance of your transmitter and confirm the compatibility) Colour:Blue & Red Material:Plastic Package Contents: 1 x Blue Adjustable Elastic Strap 1 x Red Adjustable Elastic Strap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.