Product description: Product name: 32-channel motion sensor stair controller Voltage: DC12V Power: 500W MAX Channel: 32 (set to 1-32 steps) color: Black material: plastic Sensors: 2Pcs Pir Motion Sensor NOTE: 1- A/B sensors need to be installed at the entrance and exit of the stairs and face the human body. 2- The product is low voltage 12V-24V, need to connect transformer. Do not directly connect 220V, it will burn the controller. 3- The product is not waterproof. Important note:The positive and negative terminals of the power supply input of the controller cannot be reversed, the red wire V+ is connected to the positive electrode of the switching power supply, and the blue (or black wire) V- is connected to the negative electrode of the switching power supply. Package Contents: 1 x controller 2 x extension cord 2 x 13mm probe