UseThis is a waterproof clock to ensure that you can make reasonable arrangements in the morning's rush time to avoid being late to school, work or any appointment Easy to installThis clock has a large, strong suction cup that can attach to a smooth, dry surface and is easy to install. Wide applicationThis product can not only be used as a wall clock, but also as a decoration for your home, bathroom or kitchen. Replacement batteryYou can rotate in the direction of the mark so that it is convenient to remove the button battery. Use an ordinary AAA battery. PlaceIt can be placed in the bathroom, kitchen, living room, bedroom and much more. Battery: 1 * AAA Battery (Not Included) Product Size: Approx. 7 * 4cm / 2.8 * 1.6" Package Included: 1 x Waterproof Clock Note: It's slightly waterproof and can't be thrown directly into the water.