Colour:Green Observation: 1-3 (red part) indicates that watering is needed, 4-7 (green part) indicates that the soil moisture is moderate, and the watering time can be adjusted according to the needs of the plant, and 8-10 (blue part) indicates that no water is required. Suitable for plantations, gardens, indoor potted plants, etc. Only suitable for soil, not for liquid. Material:plastic, Weight: 0.34392112872 Pounds, Manufacturer: Aisuoka