and high quality. Easy to use: No batteries or electricity needed, plug and use Easy observation: this water level indicator can show the water level to remind you to water Widely Used: This water level indicator is used for flower pots, a perfect tool for indoor and outdoor use Important note: If there is no water in the pot, the buoy of the water level indicator is at the bottom. With that in mind, pull the water level and aquatic plants through the hole Type: Water level indicator color:As shown Material:plastic size:20cm Package Contents: 8 x water level indicator Only the above package content, other 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.