1. Made of Plastic material, with high impact resistance, heat resistance, low temperature resistance, nice chemical resistance properties. 2. High accuracy, support the detection of the humidity, light and ambient temperature in the soil of green plants, lawns, etc. 3. WiFi connection, connect to IOS or Android "Tuya" App . 4. Cellphone APP control, accurate readings, so that users know the specific situation of the soil at any time, to solve the traditional temperature and humidity is not easy to read the problem. 5. Mobilephone APP displays the soil temperature and humidity in the detection, and Low temperature alarm when low -15??C(5??F). Multifunctional design, statistical temperature and humidity function. Wide range of applications, suitable for gardens, lawns, vegetable fields, farms, potted plants, vegetable greenhouses, etc. Waterproofing: IP67 Working frequency: 2.4GHZ Transmission distance: 150m Temperature range: -20-85??C(-4??F-185??F) Humidity range: 0- RH Light intensity: 0-100,000Lux Temperature resolution: 0.1??c Humidity resolution: 1% Power supply: 2xAA battery(Without battery) Low temperature alarm(Only APP can display the alarm ):less than equal -15??C(5??F) The actual product may have slight color difference or difference, which not affect the use Colour:Green Material:Plastic Package Contents: 2x Soil meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.