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 rated, suitable for daily waterproof use, splash resistant, ideal for kitchen, bathroom, bedroom, living room, etc. Note: Please remove the protective film. Otherwise, the LCD screen will not be visible even with batteries installed. Mounting options: PVC suction cups for ceramics, windows, glass, mirrors; wall hanging holes; can be placed on sinks, tables, and shelves. If you are not satisfied or the product does not work, please and we will provide a full refund or free replacement. This product is sold by VORRINC online store. We are not responsible for purchases made from other sellers.