Features 1、1. Radio transmission circuit and coding technology to solve the problem of signal interference blocking. 2、 2. A variety of temperature modes can be adjusted, suitable for different scenarios. 3、 3. Wireless transmission of data signals, mobile phone remote monitoring. 4、 4. Ultra-low power consumption, long battery life. 5、 5. With low voltage monitoring and prompt function. 6、 6. Regularly send online reports to the host. 7、 7. Anti-dismantling design in professional security field. 8、 8. Split design, high reliability. 9、 [Applicable to various occasions] This application can preset the temperature and humidity alarm range. Can be used indoors and outdoors, suitable for older children, pets, livestock care and beekeeping, beer, wine and spirits, plants, farms including seeds and bulbs, cellars, greenhouses and even any plant or farm. It will bring you unprecedented intelligence, convenience and more health, saving you more energy and money. Specifications Material: ABS Size: 64X64X28mm Color: White Net weight: 72g Communication method: WIFI 2.4G Working temperature: -10~+55℃, 0~100%RH Power supply mode: DC 4.5V (3 AA batteries not included) Package List 1*temperature and humidity sensor 1*instructions