Description: Specification: Temperature Range: -10℃～+50℃(+14℉～+122℉) Humidity Range: indoor 20% ~ 95% RH（When the humidity＜20%RH, display “Lo” directly; When the humidity＞95%RH, display “HI” directly） Power-supply: 1 x 1.5V AAA Battery (not included) Functions: Temperature & humidity display Temperature unit℃/℉changeable Highest/ lowest temperature alarm function (Default setting: highest 28℃; lowest 18℃) Adjustable temperature alarm range Operations: 3-1 Open battery compartment cover, take out the polarity insulator, put on the cover, then the meter starts to work. 3-2 BUTTON function: [SET] set of Highest & lowest temperature alarm range. [UP(+)] increase the value of what is under setting. [(-)] decrease the value of what is under setting. 3-3 original, press and hold [SET] for 2 seconds, the value around “SET of Hi.” (of Highest temperature alarm value) flashes, press [UP(+)]/[(-)] to increase/decrease of Highest temperature alarm value; then press [SET] for 1 time, the value around “SET Lo.” (The lowest temperature alarm value) flashes, press [UP(+)]/[(-)] to increase/decrease the lowest temperature alarm value; finally, press [SET] for 1 time to confirm the setting. Specification: Material: PP Size: Approx. 8.4x9x2cm/3.30x3.54x0.8inch Package Includes: 1 Piece Digital Thermometer Alam 1 Piece User Manual Note: Attentions: 4-1 Taking out the battery from the battery compartment for 2 seconds if any abnormal display appears. 4-2 Put the replaced battery at places appointed by . 4-3 We do not notice if any technical change is applied in this meter.