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 rating, suitable for daily use with splash resistance; ideal for kitchen, bathroom, bedroom, or living room. Note: Please remove the protective film from the screen. Otherwise, the LCD will not be visible even with batteries installed. Mounting options include PVC suction cups for ceramics, windows, glass, and mirrors; wall hanging holes; and support for sinks, tables, and shelves. This product is designed for indoor use and intended for personal household applications.