Material:nylon fabric+metal shrapnel
Unit size:35*3 cm
Battery:1*CR2032(replaceable)
led color:Red,Green,Blue,Yellow,White
Style:Night Cycling Jogging Running
Function:Night Runner Safety light
https://www.asafetyproducts.com/reflective-promotion-gifts/reflective-armband/slap-reflective-led-armband.html