Made from stainless steel. No battery needed. Egg shape design, fashion and lovely; Perfectly for using in kitchen, make your cook easier; Great for cooking/timing games/exercise/timing phone calls or teachers time out for the kids.Set the scale to zero first, then need to turn clockwise to 55, and turn counterclockwise to time you need when use. 2 1/3″ L x 2 1/3″ W