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 supplierProducts from huida's storeProducts from KJ's store