Inkbird ITH-20R Digital Hygrometer Indoor Indoor Outdoor Wireless Receiver Thermometer Humidity Gauge with Accurate Temperature Humidity Display Monitor (ONE Receiver ONE Transmitter)

Temperature range: -40~70℃ (-40~158°F); Humidity range: 10~95%. The outdoor transmitter is rain and splash resistant (but cannot be submerged in water), making it suitable for use in greenhouses and reptile vivariums. The unit can monitor up to 4 locations with the purchase 2 additional remote transmitters.