Use the attached iron sheet to make the bathroom clock more sturdy and prevent it from falling off Kindly Reminder Before use, wipe the mirror surface clean with a damp towel and leave some water on the mirror surface before attaching the suction cup. And always regularly check the suction to make sure it is secure at all times. In addition, a single sided adhesive small iron sheet is included with the packaging. Stick the single-sided adhesive small iron sheet anywhere, and the built-in magnet behind the bathroom clock can be attached to the iron sheet. We strongly recommend using this method to place this bathroom clock. Specifications of the Bathroom Clock Big time display for easy reading & Touch botton to easy set timer functionIndoor temperature display with F/C switchable & Indoor relative humidity displayMeasure Temp. Range: -10°C to + 50°CMeasure Humidity Range: 20~90%Mounting Method: Hole, Stand, Magnet, Suction CupMaterial: PC+ABSCount up Timer: 1-99 Min 59 Sec Count down Timer: Max 99 MinutesAlarm: Keep for 3 MinutesWaterproof: IP24Power Supply: 2*AAA Battery (Included)LCD Screen Size: 8.1*7.4cm/3.2*2.9"(L*W)Size: 105 * 40 * 105mm(4.13 * 1.57 * 4.13in)(L*W*H) & Net Weight: 140g Wide range of usage scenarios, suitable as a gift This digital clock with touch screen timer, thermometer is elegant and stylish, perfect as a gift to parent, cooking enthusiast, dressmaker, office worker, teacher, sports person, slot car racing enthusiast, athlete. Ideal for keeping track of time whilst timing yourself in the bathroom showering, as well as cooking in the kitchen, studying in the office, monitoring classroom time, or simply timing a recreational workout whilst observing the indoor temperature and humidity. Its size is very compact, lightweight, portable and convenient, which makes it perfect and adaptable for any occasion.