Features: 1) No batteries are required, charged by shaking 2) Minute of shaking will give up to about 5 minutes of continuous bright light 3) Ergonomic design, environment protection 4) Waterproof, float on water surface Inner packing: Color box or transparent packing Outer packing: 100pcs/ctn Carton dimension: 47.5 x 37.5 x 24.5cm N.W.: 12kg G.W.: 13kg