IKEA 40414197 Plant Watering/Soil Moisture Sensor, Green Pin-Type Digital Moisture Measurer  (230 mm)

Place this plant watering sensor in the growing media of your potted plants. The sensor flashes blue when it is time to water. When not flashing, do not water. The sensor indicates the need for water based on 3 levels – rarely, medium frequency and often. Set the sensor according to the amount of water your plant needs. The 3 levels of the sensor correspond to our potted plants levels for water needs. Only recommended for indoor use. Remove the battery when the watering sensor is stored or not in use. Approved for IP44. When the sensor flashes red, you need to change the battery. Battery not Included. 1 pc AAA required. Package(s): 1 Plant watering sensor