Check the listing for details. Soil Moisture Meter Soil Water Hydrometer for Gardening. Condition: New. Listed at 12.99 USD. Soil Moisture Meter Soil Water Hydrometer for Gardening Simple and Effective Gouevn Soil moisture meter only for testing soil moisture, basic model works stably. Plug and read, responds quickly and provides easily readout. Large dial, includes plant watering guide printed on the back of the packaging. Indoor and Outdoor Use A super helpful tool for your garden, yard, lawn, farm, potted plants. Especially important for some delicate plants which are very sensitive to over or under watering. Simplified Your Life Accurate and 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. No Battery Required, Lightweight Compact and portable, Gouevn 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. Important Tips 1. This moisture meter is designed only for soil testing. Never use it to test water or other liquids. 2. Do not leave the meter in the soil for a long time as it can damage the sensor. 3. Do not use it to test extremely hard soil.