Description Battery: use button battery to save power. There is a circular suction cup on the back of the watch, which can be firmly adsorbed on the glass surface. The dial adopts glass liquid crystal to display the time, the time is clear. Ideal schedule at home and in the car. The low temperature will reduce the suction force of the suction cup, and it is OK to apply some water on the suction cup. Recommendations for use: Please clean the surface to be adsorbed before pasting the electronic clock. At the same time, the alarm clock can also be used as a kitchen electronic clock. Delivery Quantity: 4pcs Package Contents: Only the above package contents, excluding other products. Batteries are not provided. Size: 8.9*2.7cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: silver (Due to different monitors and lighting effects, the actual color of the item may be ightly different from the color shown on the picture.)