Features: 1) Diameter: 9.4cm 2) Height: 2cm 3) Material: ABS 4) Functions: a switch at bottom to activate fast-blink, can flash when weight 5) For changing batteries: replace 3 batteries directly at bottom Inner packing: 1pc/color box Outer packing: 120pcs/ctn Carton dimensions: 57 x 32.5 x 22.5cm N.W.: 9.5kg G.W.: 10.5kg