Mini wireless thermometer and hygrometer, which consists of a receiver and a transmitter), can monitor real-time indoor and outdoor temperature , humidity. Perfect for baby room, warehouse, greenhouse, etc. Features: Mini Thermometer and Hygrometer: it consists of a display console(receiver), and a wireless thermo-hygrometer(remote transmitter). Indoor , Outdoor Monitoring: LCD shows real-time indoor and outdoor temperature , humidity, low power indicator and reception icon, helping you monitor indoor and outdoor conditions simultaneously. °C/°F Unit Switchable: easy to switch temperature units by the top button. Accurate Reading: 0~60°C(32~140°F) indoor temperature range and -40~60°C(-40~140°F) outdoor temperature with ±1°C accuracy, 10~99% humidity range with ±5% accuracy. Long Transmission Distance: under most conditions, the wireless transmission distance is 30m~100m(98~328ft) in open air. 60 seconds update rate. Easy Installation: the receiver has a foldable stand and a hanging hole on rear, you can place it in the upright position or hang it on wall. Also, the transmitter has a rear hanging hole. Wide Application: perfect for baby room, guitar room, bedroom, camping tent, warehouse, greenhouse, etc. Note: The default temperature unit is °F. Please take out of batteries firstly before switching °C/°F unit, otherwise the °C/°F button will not work. Specifications: Material: ABS Wireless Transmission Distance: 30m~100m(98~328ft) Update Rate: 60 seconds Indoor Temperature: Range: 0~60°C; Accuracy: ±1°C; Resolution: 0.1°C Outdoor Temperature: Range: -40~60°C; Accuracy: ±1°C; Resolution: 0.1°C Indoor Humidity: Range: 10~99%; Accuracy: ±5% (only guaranteed between 20~90%); Resolution: 1% Outdoor Humidity: Range: 10~99%; Accuracy: ±5% (only guaranteed between 20~90%); Resolution: 1% Frequency: 433.92MHz Receiver Power: 2 * AAA battery(not included) Transmitter Power: 2 * AAA battery(not included) Receiver Size: 6 * 7.5 * 2cm / 2.4 * 3 * 0.8in LCD Size: 4 * 5cm / 1.6 * 2in Transmitter Size: 5.5 * 7.5 * 2cm / 2.2 * 3 * 0.8in Package Size: 17 * 8 * 3.5cm / 6.7 * 3.1 * 1.4in Package Weight: 110g / 3.9oz Package List: 1 * Receiver 1 * Transmitter 1 * User Manual(English)