Battery Easy operate: Uses mechanical sensing technology without batteries, offering an Sustainable solution while eliminating battery replacement hassles Wide Application Ranges: Perfect for various environments like greenhouses, cafes, sunrooms, and indoor spaces to measure outdoor temperatures precisely in different scenarios Easy Installation: Simply remove off the adhesive backing and Stick on any surfaces for Fast use, providing effortless setup suitable for all users Strong ABS Construction: Produced of ABS and acrylic materials with excellent Effect resistance, ensuring long lasting reliability in daily use Double Temperature Display: Shows both and readings simultaneously, allowing users to choose their preferred unit for accurate outdoor temperature, Manufacturer: Kaeltsyn