Features: Compact and Durable Structure High Clarity Quartz Glass Chamber Indicator Screen Design Rubber Seals to Prevent Leaks External ballast with on/off switch Easy Installation Low Energy Consuming Safety Mechanisms to Help Protect against UV-C Radiation Exposure Specifications: UV Lamp Power: 55W 110V Total Power: 58W Max. Pressure: 0.3BAR Max. Flow: 5000L/H Fit for Water Flow: 50000L Conetctor Size: 3/4" to 1-1/2" Package Contents: 1x 4-pin UV lamp 1x External Ballast 2x Suction Cups 2x Connectors 1set Accessories Necessary hardware To save your fishes, please don"t hesitate to bring this awesome Aquarium UV Sterilizer home!! NOTICE: Please make sure that you read the instructions carefully before using it!!