Features: 1. Accurate Measurement, Whether There Is Rain Or Snow, Support Rs485, Switch Signal Output 2. Automatic Heating Function, Automatically Heating When The Temperature Is Lower Than 15C, Preventing Freezing And Condensation, And Controlling The Temperature At 40C To Prevent Overoxidation Caused By Dry Burning 3. Stronger Oxidation Resistance, The Measuring elements Is Made Of Silver-Plated Material To Long-Term Stability Of Sensitivity 4. The Alarm Setting Can Be Reset And Delayed To Avoid Frequent On-Site Alarms. For Example, If The Value Is Set To 10s, The Detected Rain And Snow Will Be Detected For More Than 10s Before The Detection Of Rain And Snow Will Be Detected And The Alarm Status Will Be Output. 5. High-Quality Waterproof, Outlet Design, Suitable For A Of On-Site Environments, Good Sealing 1. Power Supply: 10~30DC 2. Response Time: 0.5s 3. Output Signal: Switch Value/RS485 4. Storage Temperature: -40~80C 5. Protection Class: IP68 6. Heating Start Ambient Temperature: Less than 15C 7. Maximum Heating Temperature: 40C 8. Measurement Accuracy: 1% 9. Power Supply Voltage: 12V DC 10. Measuring Range: With Or Without Rain And Snow 11. Resolution: 2 Seconds 12. Measurement Object: Rain And Snow 13. Size: 8.9 x 6 x 3.8cm 14. Material: ABS 15.Color: White & Green Package Contents: 1 x Rain And Snow Sensor 1 x Chinese And English Manual 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.