Power source: 3V DC (CR-2032 x 1 piece) Function: 12-/24-hour time, total steps, measuring distance,calories and weight can be setup step, measured fat Unit size: 6x6x2.5cm Packing: White box Quantity: 250 pieces/carton Caron size: 37x33x33cm Net weight: 13kg Gross weight: 14kg