brand new and high quality Compact and portable LCD display Display temperature, humidity and for time simultaneously Low power consumption and high stability & accuracy Memory of MAX & MIN measuring value 12 / 24 hour format Centidegree /Fahrenheit selectable Integral-hour alarm function Positive three buttons can set the time Fahrenheit temperature transformation in the back, there is a black button inside the small round hole, one click can transform Alarm function Clock & Calendar function (month and date) Desk-top placing or Wall Hanging Temperature range: -50 ~ +70C ( -58 ~ +158F) Humidity range: 20%~99%RH Resolution: temperature: 0.1 C (0.1F), humidity: 1% RH Accuracy: temperature: +- 1C (1.8F), humidity: +- 5%RH (40%~80%) Storage condition: -20C~60C, 20~80%RH Power: one AAA battery(Not included) Dimension: 10cm*10.8cm*2cm(approx) Package includes: Thermometer hygrometer with alarm clock*1 English user manual*1