This is a compact indoor temperature and humidity detector, designed to measure temperature and humidity levels in your home or office. With its small size, this device is easy to use and provides accurate readings to help you maintain a healthy living environment. Features: Compact Size: Designed with bracket and holes integrated housing, it supports placing on the table or hung on the wall. You can put it anywhere without taking up too much space. High Precise: With automatic calibration function, high sensitivity, superior interference resistance ability, stable working performance, with low power consumption. Real-time detection, automatic refresh data, with multi-use. Digital Display: You can see the humidity value, temperature value, calendar and clock clearly. Cellphone Smart Life APP Control: Through the Smart Life APP, you can remotely control and view historical data at any time. Cut-out design at the back: It not only ensures sufficient contact between the sensor & the air, but also facilitates heat dissipation and improves the detection accuracy. Wide Applications: Suitable for agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, and etc. Specifications: Model: PT19DW Material: ABS Temperature Range: -20C ~ 70 (0.5) / -4 ~ 158 (1) Humidity Range: 0 ~ 99 % RH (5 % RH) Wireless Connection Type: Wi-Fi (PT19DW, only for 2.4GHz Wi-Fi network) Power Supply: Built in Lithium Battery (2400mAh) Input: DC 5 V=1 A Item Size: 8.3 * 8.3 * 3.2 cm / 3.27 * 3.27 * 1.26 inch Item Weight: 139g / 4.9oz Package Size: 10.2 * 8.8 * 4.3 cm / 4.02 * 3.46 * 1.69 inch Package Weight: 190g / 6.7oz Packing List: 1 * Device 1 * Instruction manual 1 * USB cable