The Tunze switched socket outlet allows you to utilize any pump with your Osmolator ATO. While the included pump is great for a vast majority of users, there are some instances where you may need a slower pump or one with more head pressure. This is where the switched socket outlet comes in. Connect outlet to Osmolator: -Locate the end of the wire coming out of the connector. -Loosen the small screws to remove the terminal block and expose wire. Adjust power: -Ensure all component are unplugged from the wall, or any energized electrical connections, and unscrew the control box. -Locate the potentiometer, which is a small dial, used to set the power anywhere from nano to max. Note: the instructions state the max setting is required when using the switched socket outlet, presumably because to maximize the signal. Your Tunze Osmolator is now configured to control the AC outlet rather than the included DC pump and you are ready to plug in any basically aquarium pump up you like! FYI for the rest of you that are using the standard DC pump that comes with the Osmolator; this dial will change the speed and height at which the Osmolator pumps water. The nano setting has a max pumping height of 1 meter, medium of 2.8 meters and the max will pump water as high as 3.8 meters. Connect with us on Facebook: http://www.facebook.com/BulkReefSupply Check out our pics on Instagram: http://instagram.com/bulkreefsupply *Legal Stuff* The purpose and content of this video is to provide general information regarding the products and their applications as presented in the video. Aquatic sales solutions, inc. And its officers, directors, employees and agents disclaim all express or implied warranties, in any way, related to the products and their application as presented in this video, make no representation or warranty regarding the products and the application as presented in this video and shall not be liable for any direct or indirect losses or damages of any type, including but not limited to punitive damages, or from personal injury or death resulting from or in any manner related to the video, and the products in and contents of the video. The viewer expressly agrees that aquatic sales solutions, inc. And its officers, directors, employees and agents shall not be liable for any damages or losses related to the products in and content of the video and hereby agrees to hold the foregoing harmless from any such losses or damages.