In- Features: OOTDTY The water replenishing device can intelligently and automatically replenish an appropriate amount of water according to the change of the water level in the fish tanks, so as to keep the water level in the fish tanks stable. Time-saving and labor-saving: there is no need to manually add water or check the water level frequently, which saves time and energy in taking care of the fish tanks and reduces the risk of water quality fluctuation. It has strong stability, leak-proof safety design, and ensures the safety during use. Suitable for fish lovers, whether novice or experienced, can use this automatic water replenishment device to maintain the water level of fish tanks and ensure the he growth of fish. You can rely on this product for automatic management and reduce the burden of taking care of fish tanks. Specifications: Material: Plstaic Type: 2 Kinds Optional Package Includes: 1x Water Replenishing Device Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.