Usage Tips:Package includes: you will receive 3 pieces digital thermometer hygrometers with accurate reading, you can use them for your multiple purpose Suitable occasions: the hygrometer thermometer gauge with probe design can provide accurate reading, whcih is proper for incubators, greenhouse, reptile tank, guitar case, cigar humidors in home, restaurant and office, you can monitor temperature and humidity timely Measuring range: the digital thermometer hygrometer shows in Fahrenheit, temperature measuring is between -58Fahrenheit - 158 Fahrenheit; Humidity measuring range is 10% - 99%RH; Temperature measurement accuracy is 2 Fahrenheit; Humidity measurement accuracy is 5%RH; Fast response with every 10 seconds Easy to read and use: with large LCD display, the digit is easy to read, you can read easily even in the distance; The temperature humidity meter gauge requires 2 pieces LR44 button batteries (included), after you install batteries, just put the sensor probe on the place you want to measure, please note that the sensor probe is non-waterproof, don't use it as a aquarium thermometer Quality material: the digital thermometer hygrometer is made of quality ABS material, durable and lightweight, the LCD display screen is easy to read; Besides, the stainless steel probe makes the reading more accurate Colour:black Material:ABS Package Contents: 3 x Hygrometer Only the above package content, other products are not included. Note: Light shooting 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.