ITEM NAME:Indoor/Outdoor Soil Moisture Sensor Meter Hydrometer For Garden, Lawn Plant E3F3 description: 100% high quality No battery, plug and play. Easy-to-read humidity level, including ten scales. Simply insert the probe into the soil about 10 cm (about 3-5 inches) above the probe to be inserted for the most accurate measurement. The soil moisture meter lets you know when to water. This is a necessary tool for outdoor and indoor plants, gardens, lawns, vegetables, etc. Small and portable, convenient for indoor / outdoor use. Our soil measuring instrument is a combination of precision, accuracy and durability. Easy to read moisture, get readings quickly and promote healthy plants. Color-coded reading system, from red, green to blue. Do not touch stones or hard rocky soil. If the soil is too hard and too dry, it is easy to damage the probe. Designed for testing soil only, not for PH testing of water. After use, the probe needs to be cleaned and wiped. Product name: Soil Moisture Meter material: plastic Features: no battery, easy to use, gardening tools Length: 18cm / 7.09 inches (approximately) notes: Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurement methods, please allow a slight difference in size. The package includes: 1 x soil hygrometer.This is a necessary tool for outdoor and indoor plants, gardens, lawns, vegetables, etc. Do not touch stones or hard rocky soil. Designed for testing soil only, not for PH testing of water. No battery, plug and play.