12V/24V Human Body Motion Sensor Switch Controller for LED Light Strip
15.68 $
18.81 $
On the left is 'OUTPUT 12/24 V', which is connected to the LED strip.
On the right is 'INPUT12 / 24V', which connects the DC line and the power supply.
In addition, if the order is '-+ +-' from left to right, then '+' '-'.
Common thread is '+'.
The black line is '-'.