Description: Name: Gravel Cleaner Material: plastic Power supply: 2 * 1.5V C type alkaline batteries (not included); AC power adapter AC input: AC110-240V 50/60Hz Output: DC 3V, 2A Plug power; support Battery power supply: support Flexible hose length: 70 cm/27.56 inches Feature: This electric aquarium cleaner is simple and easy to use. It can effectively and quickly complete the daily water change work of the aquarium, saving you a lot of time to clean the aquarium. Compared with the manual sand washing machine, there is no need to clean by hand, which is convenient and practical! Packing list; 1*Gravel Cleaner Electric Aquarium Gravel Cleaner, Automatic Fish Tank Cleaning Tools Gravel Vacuum for Aquarium, Suitable for Change Water Wash Sand Water Filter and Water Circulation Aquarium Gravel Cleaner, Electric Fish Tanks Gravel Vacuum Cleaner Set for Remove Dirt, Change Water, Wash Sand, Water Shower, Water Circulation Aquarium Rechargeable Gravel Cleaner Kit,Energy Saving Powerful Fish Tank Siphon Vacuum Cleaner,Portable Automatic Water Changer,Adjustable Flow Rate Wash Sand Electric Aquarium Gravel Cleaner, Automatic Fish Tank Cleaning Tool Set Removable Vacuum Water Changer Sand Washer Filter Changer Notes: 1. Please keep the water level between MAX and MIN, and then start the switch. When the water outlet can pump water, raise the gravel cleaner so that the head and the water outlet are above the water surface. 2. Due to manual measurement, 1-2cm error is allowed, please refer to the actual product.