The USB cable small size flexible red light wrap comes with a pad, user manual , stretchy bands and removable pocket to insert power bank . It sets 3 levels for dimming : low / middle / high mode for brightness . Just needs to plug in with an adaptor (not included) or powered by power bank . So the user can enjoy the red lighting anywhere they want to do . The small size wrap is recommend for small treatment like arm , feet , leg ect. .