The clock is powered by two AAA batteries (not included), requiring no wires or plugs. [Countdown]: Total countdown is 99 minutes. Easily set the timer alarm by pressing the touch button on the front. [Easy to Read and Use]: The large LCD display shows the time, 12/24 hour format, temperature C/F, humidity, alarm, and countdown. No backlight. [Waterproof]: IP24 waterproof, everyday waterproof body, splash-proof, suitable for kitchens, bathrooms, bedrooms, living rooms, etc. Note: Please remove the mask with the sticker. Otherwise, the LCD screen will not show anything even if the batteries are installed. [Fixing Method]: PVC suction cup for ceramics, windows, glass, mirrors; wall-mounting hole; supports sinks, tables, and shelves. If you are not satisfied or the watch does not work, please email us and we will refund you or resend it for free. This bathroom clock is only approved in the VORRINC online store. We are not responsible if you purchase it from other suppliers.