Fast response and accurate: updated the reading every 3s. Use more sensitive chips sensor, accurate humidity and temperature. Measuring range for temperature from -9.9C to 70C (14F to 158F) and humidity from 10% to 99%. Temperature Deviation: 0.3 (0.3). The room climate level is in addition to the values of indoor temperature and humidity. Easy to read data: Use HD FSTN SCREEN, can read clearly from any distance in the room. The measurement screen is larger than others, the back screen of the hygro-thermometer is full view and high contrast, can see it super clear from any angle. Suitable for baby room, dorm room, bedroom or in the wine cellar. Our patent font for clearer display. High quality that you can keep our hygrometer for many years. Good design and High quality: Adopt a concise design style, white body with narrow frame, ABS shell. Smooth shape and clear number display, comfortable and minimalist home style. Selected materials and diversified use: BFOUR indoor thermometer and hygrometer adopts a full-screen design, narrow frame, ABS shell, easy to clean, no peculiar smell. The smooth shape and clear digital display will make it easier for you to read. It has a desktop stand and a magnet base, can be placed anywhere you want, suitable for various types of places, is a practical and beautiful design. After-sales service and guarantee: We provide a 2-year after-sales guarantee service.Each of our products has undergone professional testing to ensure that you receive high-quality products. Two CR2032 batteries are included for operation. One for replacing. With HD LCD and update every 3 seconds, performance can be a little fast. Behind stand and strong magnet with it, stick on the table or on the fridge.