No separate controller needed, the color mode of the cell bulb can be changed by the button. IP68 Waterproof: Better cooling and 100% IP68 waterproof, quality is absolutely guaranteed. Comes with a 33ft corrosion-resistant and UV-resistant power cord. Warning: Light can not work for metal pools, there must to be no metal between 2 sides. Specifically designed for 120V swimming pool above ground light fixture.Package Include: 2 Pack WYZM LED Pool Light. The item "2 PACK WYZM LED Pool Light for Above Ground Swimming Pool, Color Changing US NEW" is in sale since Tuesday, July 7, 2020. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Other Pools & Spas". The seller is "briteworld2018" and is located in TX. This item can be shipped to United States.