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 extremely sensitive to your heart's electrical signals Utilizes the snap attachment Compatible with different heart rate sensors (ANT+, Bluetooth 4.0, 5.3K) Suitable for , , , etc products Suitable for Geonaute H3 H7 M400 v800 Wearlink M32 etc, Tickr 520, move, , , 530, , ant+ sensor, TICKR or TICKRx, forerunner 610, h6, Bryiton 330, H3, -Run, etc Total Length: . 100cm before elastic (elastic and adjustable to fit different body size) Two snaps Distance: . 45mm (please check the distance of your transmitter and confirm the compatibility) Colour:Red Material:plastic Package Contents: 1 x 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.