Function: Detecting a non-contact position and when there is an obstacle blocking the probe the output control level. Instructions for use: Input supply voltage: DC7-35V. Power consumption: look to take control of the output load may be if it is a 5V relay if the maximum current consumption is about 60mA 5V output to bring the buzzer the maximum current consumption of about 40mA.. If the output is only controlled high and low then the maximum current consumption of less than 15mA. Static power consumption is about 7mA. Input and output signal voltages: OUT-end: OC output NPN transistor open collector output. (That is triggered then the output port the output signal path will take you to the ground control received GND. It is low) the control current is about 30mA. OUT + end: OE output NPN output transistor emitter electrode open. (That is triggered then the output port the output signal path will take you to control receiving 5V power supply. It is high) control current is about 30mA. GND: common ground. V +: Power 7-36V input. Marked on the back of each module has a nominal foot. The product advantages: 1. There are two board set aside the M3 screw holes so that the fixed stability better occasions in shock when partial bit more difficult. 2. Power supply module make work a more stable state the power to adapt to a wider range. 3. The module has two working lights more intuitive use. Note: 1. It is not the obstacle transparent objects such as glass. 2. Detection distance from the probe outside the :1-5MM. Distance can be adjusted via potentiometer module.