About us: REPTI ZOO is a company focus on production of reptile supplies,already have more than ten years experience in producing reptile pet products.Our goal is to provide customers with high quality products and excellent service. Feature Material:Plastic Power supply:1xLR1130/AG10 button cell(included) Temperature range:14H to 122H Humidity range:20% to 99% Accuracy:+/-2H,+/-5% Sampling interval:5 seconds Screen size:0.8 X 1.3 in Weight:Approx.19oz Note: Make sure surface is clean. Use only on slick, smooth surfaces such as glass,metal,ceramic tile,plastic,formica,etc. Wetting the suction cup first before using make it easier to stick. package included: 1 x REPTI ZOO Reptile Terrarium Thermometer Hygrometer - The accurate measure of temperature and humidity in vivariums, hatchers, brooders, propagators, etc. - Digital display and easy to read on a clear LCD screen, two modes of mounting the suction cup make you can put the thermo-hygrometer on the front or side glass of terrariums as you request. - Easy to install: The suction cup can be adsorbed firmly on the side or back of the terrarium. - One extra battery is included for standby in the package, two batteries can be used for more than one year. - 100% quality assurance: we provide 12 months of quality assurance, Should you have any inquiries regarding our product, please reach out to us, and we will respond promptly to assist you within 24 hours.