Dimensions: (small) - Intended for pot sizes of 6-15cm - Ideal for small succulents The Aquameter 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 Set includes refillable watering sticks - 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; blue indicates it's been watered<br><br>Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color: green Material: plastic<br><br>Package Contents: 4 x Plant Soil Moisture Sensor<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.