... 3,sensor distance:8-10M 4,CE&ROHS High quality 20w smd2835 led microwave sensor ceiling light ... on automatically when one comes , automatically turn off when one goes out.7)the lamp shell ... resistor,you can freely adjust the light sensitivity,delay time,Sensing distance.pls see the below ... ,We set up these parameters (light sensitivity,delay time,Sensing distance)according to your needs.Installation ...