Made of ABS material with good processing, this thermometer hygrometer has nice resistance to wear, strong and durable for not to break and deform easily, you can use it for a long time. Our wireless hygrometer thermometer is nice for measuring indoor and outdoor temperature and humidity. Features -Color:Black -Material:ABS -Size:15.20X9.55X2.20cm/5.97X3.75X0.86in -Size:10.50X5.00X2.60cm/4.13X1.97X1.02in - Power supply: 3 x AAA batteries(Not included) - Measuring range: - Indoor temperature display range: -9.9 degree centigrade ~ +50 degree centigrade & 14 fahrenheit scale ~ +122 fahrenheit scale - Indoor humidity range: 20%-95% RH - Outdoor temperature display range: -40 degree centigrade ~ +60 degree centigrade & -40 fahrenheit scale ~ +140 fahrenheit scale - Outdoor humidity range: 20%-95% RH - Resolution: - Temperature display resolution: 0.1 degree centigrade & 0.1 fahrenheit scale - Humidity display resolution: 1%RH - Error: - 0 degree centigrade to 40 degree centigrade/ 32 °F to 104 °F: ±1 degree centigrade/1.8°F - -20 ~ 0 degree centigrade/40 degree centigrade ~ 65 degree centigrade/-4 fahrenheit scale ~ scale/104 fahrenheit scale ~ 149 fahrenheit scale: ±2 degree centigrade/3.6°F - 40%RH to 80%RH: ±5%RH - Manufactured with reliable ABS material, thermometer is durable and practical for long term use. - Small design, easy to put this weather thermometer on tabletop, desktop, bedside, and any place you can get a glance. - This indoor outdoor thermometer features temperature and humidity monitor, allow you to make proper comparisons. - Indoor outdoor thermometer is perfect for home, reptile tank, room, office, incubator, garage, basement and more. - Accurately measure temperature and humidity, small errors, and you can read the numbers easily. Package list: 4 Thermometer 4 x Launcher