The 20 Complete ES32 Channel Tread Intelligent Motion Sensor LED Stair Lights Kit is a smart lighting system that includes a controller with two motion sensors. The motion sensors are fixed in place using screw threads and should be installed at the first and last stages of the stair lighting. COB LED strips are installed in the middle of the stairs and connected to the controller. When people walk near the motion sensors, the LED lights turn on, creating a flowing water effect. The COB LED strips should be installed on the steps to create a stepping effect, while LED strips on both sides of the staircase create a flowing water effect. Different lengths and colors of LED strips are available. An optional waterproof option is also available with aluminum profiles and a waterproof power supply. The kit includes the controller, motion sensors, LED strips, power supply, and extension cord. LED aluminum profiles can be added for better installation and lighting effects.