32-Channel LED Stair Light PIR Motion Sensor Controller for Automatic Stair Step Induction Strip Control Product Name: 32-Channel Stair Sensor Controller Voltage: DC12V/DC24V Power: 400W MAX Channel: 32 (set for 1-32 steps) Sensors: 2 PIR sensors NOTE: 1- A/B sensors must be installed at the stair entrance and exit, facing the human body. 2- The product is low voltage 12V-24V and requires a transformer. Do not connect directly to 220V, as it will burn out the controller. 3- The product is not waterproof. Important Note: The positive and negative terminals of the power supply at the controller's input cannot be reversed. The red wire V+ connects to the positive electrode of the switching power supply, and the blue (or black wire) V- connects to the negative electrode of the switching power supply. Product Package: 1 pc LED Controller only (LED strip and power supply not included)