Compact and versatile units are ready to install - no additional tubing or circulation pump requiredBuilt in UV-C lamp ballast and single power cord mean streamline and clutter-free installation and operation.You are purchasing a high quality aquarium internal filter, with built in UV steriliser.The addition of a UV steriliser to your aquarium can assist with water clarity by killing off algae, micro-organisms, bacteria and parasites which may cause fish diseases.Size: about 25*5.5*6.5cm ; Pump power: 5W; Great for both fresh and salt water aquarium.Install in vertical or horizontal position right in your aquarium or sump.- Install in vertical or horizontal position right in your aquarium or sump.- Great for both fresh and salt water aquarium.Specification:Size: about 25*5.5*6.5cmCable length: about 1.45mUV power: 5WPump power: 5WVoltage: 220-240VFrequency: 50HzH-max: about 0.4mOutput: 500L/HPackage:1*oxygen pump (US Plug ) When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''''''''''''''''''''''''''''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!