Item Type: Heart Rate Monitor Strap Material: ABS plastic, conductive adhesive, nylon elastic band Color: Blue Package List 1 x Heart Rate Monitor Strap 1Suitable For: Heart rate monitor soft strap can compatible with Bluetooth 4.0 and 5.3K transmitters, which can provide perfect fitting. 2High Sensitivity: Heart rate monitor strap adopted soft fabric and adaptive electrodes, sensitive to your heart signals, accurately getting your heart rate. 3Usage: Heart rate monitor band is a necessary accessory for measuring heart rate, allow you can know the heart rate to maintain a healthy exercise state. 4Adjust Size: Heart monitoring machine band is elastic and can be adjusted to accommodate different chest sizes, which bring you much convenience. 5Comfortable Wear: Heart monitoring machine strap is made of ABS plastic, conductive adhesive, and nylon elastic band materials, soft and skin friendly, which is comfortable to use.