reflective LED arm band,approved with EN13356,
Material and size:
Reflective PVC in 2.5 cm (W)x 25.5 cm (L), with Velcro on the back side, and 4 LED lights .and electronic wires embedded inside. Another part of  elastic webbing with Velcro is about 18.5 cm (L)connected.

 Press the "on/off" button position that LED lights will work!

It's a very nice safety arm band