Package include: package comes with 2 pieces 10 inches diameter indoor and outdoor big thermometer and hygrometer for temperature and humidity measurement, you can put them in the places where you need to measure temperature and humidity Ranges: this thermometer digital simultaneous Celsius and Fahrenheit temperature display, temperature range is between -40 and 140 Fahrenheit / -40 to 60 Celsius , humidity measurement range 0 to 100% (RH) Material: the product is made up of plastic bottom case, plastic lens, plastic dial, aluminum pointer and without any battery, you do not need to worry about the product will rust Easy to read: this big thermometer and hygrometer is 10 inches in diameter with black bold numbers inside, black and to show more simplicity and , which easy to be read the temperature value from long distance Suitable occasions: there are hooks on the back of the thermometer and hygrometer, which make the thermometer suitable for home, office, factory, warehouse, study, garden, patio and many other occasions, it can bring much convenience to your life Specification: Colour: Black Material: PVC + resin lens Temperature measurement range: -40 to 60 Celsius (-40 to 140 Fahrenheit ) Temperature resolution: 2 (C) Temperature measurement error: +/- 2 (C) Humidity measurement range: 0 to 100% (RH) Humidity measurement accuracy: 2% (RH) Humidity measurement error: +/-7% (40% to 70%)(RH) Dimensions Diameter: 250 mm/ 10 inches Thickness: 33 mm Package Contents: 2 * thermometer indoor outdoor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.