The clock is powered by two AAA batteries (not included) and requires no wires or plugs. [Countdown]: The total countdown is 99 minutes. Timer alarms are easily set by pressing the touch button on the front. [EASY TO READ AND USE]: Large LCD display can show time, 12/24 hour format, temperature C/F, humidity, alarm and countdown. No backlight. [Waterproof] IP24 waterproof, daily waterproof body, splashproof, suitable for kitchen, bathroom, bedroom, living room, etc. Note: Please tear off the mask with stickers. Otherwise, the LCD screen won't see anything even with batteries installed. Fixing Method: PVC suction cups for ceramics, windows, glass, mirrors; wall hanging holes; support sinks, tables and shelves. If you're not satisfied or your watch doesn't work, please email us and we'll give you a 100% refund or reship for free. This bathroom clock is only approved in the VORRINC online store. We are not responsible if you buy from another supplier