RCWL-0516 is a human body motion detector that uses doppler radar technology. Use this sensor in an area and detect the presence of a human sized moving object. When triggered the output goes HIGH for 5 seconds and then resets.Glass does block the sensor but other materials such as wood or plastic have minimal effect.Voltage: 5VDistance: 3-4 metersTrigger time: 5 secondsConnectionArduino–>Sensor5V–>VINGND–>GNDAny digital pin–>OUTArduino Wall-Penetrating Motion Sensor Using The RCWL-0516 Microwave Radar ModuleHow to Get Started with a Microwave Radar Motion Sensor