The is a leave-in soil moisture sensor pen that can be left in the soil for continuous monitoring, unlike other moisture meters that need to be taken out after each measure Dimensions: (Large) - Intended for pot sizes of 25-36cm - Ideal for large succulents. Set includes five refillable watering sticks (green) - Moisture meter for house plants that has refillable replacement core - Each stick last for approximately 6- This soil aqua meter has plant water indicator that changes color depending on soil type - White indicates watering; indicates it's been watered, Weight: 0.10692419707 pounds, Manufacturer: Hipzeepo