Creative Education DIY Potato Fruit Salt Water Power Digital Clock Set Product Name : Potato Clock;Shell Material : Plastic Function : Time, Date;Display Screen Size : 6.5 x 3.1 x 1.1cm/ 2.6" x 1.2" x 0.4"(L*W*T) Cup Size(Each) : 6.2 x 4.8cm/ 2.4" x 1.9";Main Color : White Net Weight : 67g Package Content : 1 x Digital Clock Display Screen,1 x Transparent Insulation Tape,2 x Copper Strips,2 x Zinc Strips,1 x Connecting Cable,2 x Experiment Cup,1 x Detail Manual