BlingKingdom - Digital Indoor Temperature and Humidity Meter with Alarm Clock Hygrometer for Room or Car Indoor / outdoor temperature, indoor humidity display. C / F temperature switch display, comfort display. Indoor and outdoor maximum and minimum temperature memory function. Memorized MAX/MIN indoor temperature and humidity value automatically. With back stand and magnetic stick at back side, convenient to place. With a wired external sensor that can be strung to the outside of your house to sense external temperature as well as a built-in sensor to simultaneously measure the indoor temperature. Indoor Temperature : 0 to 50 / 32 to 122. Outdoor Temperature Range: -50 to 70 / -58 to 158. Indoor Humidity : 20% RH to 90% RH. Requires 1 x AAA battery ( not included). Sensor cable length: Approx. 90cm / 35.4in. Product size: 70 * 81 * 20mm / 2.8 * 3.2 * 0.8in. Product weight: 66g / 2.32oz Package Contains: 1 x Digital LCD Thermometer Hygrometer, 1 x User Manual(English)