Indoor Outdoor Wireless Thermohygrometer Temperature Humidity Monitoring Weather Clock Digital Hygrometer Comfort indicator temperature and humidity trend indicator. Degrees Celsius and Fahrenheit can be converted. back of main engine is equipped with a bracket for standing in a horizontal position. Historical temperature and humidity data can be viewed. There are two high magnetics iron in rear shells of main engine which can be attached to metal objects. unit can be suspended by hanging holes or can stand on horizontal plane. It has memory function and can record highest and lowest temperature and humidity. With backlight automatically turn off backlight after 10 seconds without operation. High sensitivity touching button control easy to operate. IPX4. Type2: 1 * Host 3 * Transmitters 4 * Pearl Cotton Bags 1 * English Instruction 3 * Explosion-proof Screw Set 1 * Leather Box Specifications: Type: 1 2 (optional) Radio frequency: 433 Type1: 232g / 8.2ounce Type1: one transmitters one explosion-proof screw set Transmitters: 40g / 1.4ounce Package weight: Host: 142g / 5.0ounce Type 2: three transmitters three explosion-proof screw set Transmitters waterproof: IPX4 Comfort display: drying comfortable moist Temperature display unit: °C/°F optional (default: °C) Indoor temperature ranges: -4° F-158 °F (-20° C-70 °C) Item size: Item weight: Refresh rate: 10 seconds Host: 114 * 96 * 24mm / 4.5 * 3.8 * 0.9in supplys: AAA battery (not included) Type2: 320g / 11.3ounce Material: Transmitters: 100 * 35 * 20mm / 3.9 * 1.4 * 0.8in temperature ranges: -40° F-158 °F (-40°C-70°C) Humidity ranges: 20%-95% Package size: 155 * 135 * 33mm / 6.1 * 5.3 * 1.3in This is a weather clock can clearly show temperature and humidity easy to read can show humidity and temperature trends. Packing List: 1 * Host 1 * Leather Box 1 * English Instruction 1 * Explosion-proof Screw Set Type1: 1 * Transmitters 2 * Pearl Cotton Bags