Feature: 1. QUIET CHILLER: Use the built in fan to run at a faint noise of 30‑35 decibels and enjoy a peaceful aquarium experience, equivalent to the quiet of a library. This ensure a peaceful and enjoyable environment for both you and your aquatic pet 2. FAST COOLING: This aquarium cooler is electronically cooled and require no refrigerating fluid. With a pump flow rate of up to 3L/Min, you can quickly reduce the temperature and keep the aquarium water cool 3. MAINTAIN BEST TEMPERATURE: Cooling in summer, heating in winter, easy fish farming, automatic constant temperature, a multi purpose machine; The intelligent controller of the tank chiller carefully control and maintain the ideal temperature, allowing your fish to swim in extreme comfort 4. INNOVATIVE DESIGN: The temperature can be adjusted from 10 to 40℃ (50 to 104℉) at the push of a simple button. In addition, the cooling hole of the chiller significantly increase efficiency and ensure optimal performance 5. USING TIPS: If you experience insufficient pump flow, try placing the water cooler under or parallel to the tank. Once the water circulation is back to normal, you can put back in original position(pump and pipe need to be prepared by yourself) Specification: Item Type: Aquarium Chiller Temperature Setting Range: 10~40℃ Suitable Water Flow: 1-3L/min Suitable Pipe Inner Diameter: Approx. 8mm / 0.31in Suitable Lift: Below Approx. 3meter / 9.8ft Suitable Tank Size: ≤20L Power: 72W. Package List: 1 x Chiller 1 x Power Cord 1 x Power Adapter 1 x User Manual