Product information :
Material: Nylon
Product Category : Chest Strap
Whether it can be stretched: Yes
Color: blue, red, green
Charging method: USB charging
Size Information:
Specifications (length * width): S code, M code, L code
Size: Diameter S 10cm, M 15cm, L 20cmXL
Packing list:
Chest strap*1
Verification Code