feature: The probe is made of 304 stainless steel: anti-rust, electrolytic resistance, acid and corrosion resistance to long-term operation of the probe. Protection class | P67: It can prevent moisture from entering the interior of the body and has better sealing performance. Industrial-grade performance: low power consumption, high sensitivity measurement, stable performance. Soil temperature and humidity measuring instrument: wireless signal transmission, APP real-time viewing temperature and humidity data, temperature and humidity history curve. Zigbee wireless control automatic waterer realizes automatic irrigation. Accurate measurement: suitable for a of soil types, can be used in potted flower boxes, courtyard , farmland vegetable fields, greenhouses, lawns and other Notice Gateway: 1. Plug the gateway into the power cord; 2. The gateway is plugged into the Internet cable and connected to the home 2.4GHz band router; 3. The mobile phone needs to be connected to the same WiFi network, and then add a gateway according to the APP prompt. soil: 1. Install the product in the place to be measured, and insert the sensor probe into the soil vertically. 2. Make that the probe is in full contact with the soil and compacted to the accuracy of the data. 3. The soil temperature and humidity measuring instrument only tests soil and soil, and is to dry flour, , organic wood chips, liquid particles, etc. 4. When the measuring instrument is inserted into the soil, please try to insert the probe into the soil as a whole. 5. The depth and tightness of the probe inserted into the soil will directly affect the measured value and cause errors. In order to improve the accuracy of the test results, please use the of multi-point testing to obtain the average value. 6. When using, be carefulnot to touch the stone at the test point, and do not use too much force, otherwise it will damage the probe. When the measuring instrument is not in use and stored, do not rub or scratch the surface of the probe directly with your hands, keep it clean and dry, and keep it from magnetic objects and other metal objects. specification: Model: Soil Tester Power supply: 2 AA batteries (not included) Sub-measurement range: 0~100% Sub-accuracy: 0~50% (3%), 50%~100% (5%) Temperature measurement range: -20~60 Temperature accuracy: 1 APP data response time: 60S Protection class: IP67 Gateway: Supports 100+ devices online simultaneously; yes Support remote control; yes Support reliable local device scene linkage, no fear of network disconnection; yes Support the interconnection of various products: yes Operating temperature: -10C ~55C Working humidity: 10%-90%RH Power interface: DC5V 1A (-USB) Wireless connection.: WiFi 2.4GHz 802.11b/g Communication protocol: ZigBee color: White material: plastic Package Contents: 1 x Soil detector(without battery) 1 x Gateway 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.