Features [Accurate Monitoring] Our monitor could provide precise real time readings of temperature and humidity with wide ranges, ensuring accuracy for any environment. [Wide Range] This meter could monitor indoor temperatures (‑10℃ to +50℃), outdoor temperatures (‑40℃ to +90℃), and humidity levels (20% to 95% RH), to maintain a comfortable and healthy living or working space. [Easy to Read Display] With clear digital display, this temp humidity gauge allows for effortless monitoring of indoor and outdoor temperature and humidity levels. [Reliable Outdoor Use] Stainless steel outdoor probe can withstand various weather conditions, ideal for reliable outdoor temperature monitoring. [Versatile Usage] Widely suitable for home, dormitory, computer room, warehouse, office, hotel, hospital, planting greenhouse, incubation room, nutrition room, laboratory, air conditioning vehicle, etc. Specification: Item Type: Indoor Outdoor Thermometer Hygrometer Material: ABS Battery: LR44 button battery x 1 (shipped without battery) Temperature Range: Indoor: -10℃ to +50℃ (+14℉ to +122℉) Outdoor: -40℃ to +90℃ (-40℉ to +194℉) Humidity Range: 20% to 95%RH Package List:1 x Thermometer Hygrometer1 x Probe1 x Instructions Note:In order to extend the service life of the probe line, it is recommended that the outdoor probe be placed on the balcony, air conditioning holes, eaves and other places as much as possible. Package List 1 x Thermometer Hygrometer 1 x Probe 1 x Instructions