This product is made of high-quality plastic and iron material, which is light fast, heat resistant and durable.A green light flashing every 2 hours indicates good humidity, an orange light flashing every 6 seconds indicates a medium humidity, and water it appropriately, a red light flashing every 6 seconds indicates that the soil is dry and watering is required immediately.Press and hold the switch button for 3 seconds to turn on or turn off the instrument. When the battery is low, you only need to remove the back cover and replace a AAA battery.With this product, you could clearly know the water shortage status of plants and avoid improper watering to cause plant death.This product has a wide range of application, it is suitable for all indoor and outdoor plants by adjusting the depth of insertion into the soil.Specification:Type: Moisture detectorMaterial: Plastic + ironQuantity: 1pcProject color: Black + WhiteBattery model: 1 X AAA battery (not included)Scale length: 10cm/3.93inPacking size: 20x6x3cm/7.86x2.36x1.18in (L * W * H)Soil depth guide:1-3cm: for tropical plants3-5cm: for indoor plants5-7cm: for outdoor plantsNote:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-3cm measuring deviation due to manual measurement.Packing list:1 * pH MeterPlease allow slight measuring deviation due to manual measuremen