Features: A green lamp flashing every 2 hours indicates goodhumidity, orange lamp flashing every 6seconds indicates a mediumhumidity, and water appropriately, a redness light flashing every 6seconds indicates that the soil is dry and waterings is required immediately. With this product, you could clearly know the water shortage of plant and avoid improper waterings to cause plant death. ABS material, corrosion resistant and long service life. Monitorings of the soil state and water content, rapid responses, accurate measurement. It is suitable for all indoor and outdoor plant by adjusting the depth of insertion into the soil. Specifications: Material:ABS Power by: AAAbattery(not included) Size:Approx.175mm/6.86''x15mm/0.59'' Package Includes: 1x Water Level Indicator note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.