No gateway is required to connect to WiFi directly, and view temperature and humidity changes through the mobile phone APP, which is convenient for you to manage plants more healthily. 24-hour real-time recording, mobile phone APP to view historical records. Applicable to a variety of fields, can meet the soil testing work of various gardening and planting sites, greenhouse planting, orchard seedlings, gardening planting, etc. Widely applicable to natural/organic plant soil, mixed plant soil, etc., not suitable for hard soil rock, organic coconut fiber, natural sandy soil. Power supply: 3 x1.5V AA batteries (batteries not included) Waterproof rating: IP65 Water measurement range: 0-100% Water measurement accuracy: 0-50% (+3%), 50-100% (+5%) Temperature measurement range: -5C-60C Temperature measurement accuracy: 1C Color: As shown Material: plastic Package Contents: 1 x Temperature and humidity 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.