SIMPLE and EFFECTIVE:Soil moisture meter only for testing soil moisture, basic model works stably. Plug and read, responds quickly and provides easily readout. Large dial, ten scales. Includes watering guide for 200 plants printed on the back of the packaging. INDOOR & OUTDOOR USE: A super helpful tool for your garden, Yard, lawn, Farm, potted plants etc. Especially is important for some delicate plants which are very sensitive to over or under watering. LONG PROBE SENSOR: 7.7 probe length specifically designed for measure water at the root level, For use on any plant, even it is big potted plants. NO BATTERY REQUIRED, LIGHTWEIGHT: Compact and portable, plant water meter No batteries or electricity needed, stick the sensor probe into the soil area you want to check and instantly get an accurate reading. SIMPLIFIED YOUR LIFE - Accurate & easy to read, When you have a lot of houseplants, you don't have to remember when you watered this or that, just check each one with the moisture meter and water accordingly.