[NOTABLE FEATURES OF PHOTOELECTRIC SENSOR SWITCH]:E3JK-R4M1switch is small size, multi-function, long life, high precision, fast response.It is very and can be used for a long time [SOME THINGS YOU NEED TO KNOW]:Photoelectric switch is the use of the test object to blocked or reflected beam, by the synchronization loop gating circuit to detect the presence or absence of the object. All objects can reflect light can be detected. [SOME ADVANTAGES]:E3JK-R4M1 AC90-250V square lens reflex photoelectric switch five lines,detection distance and anti-light, electricity, magnetic interference capability advantages. [GOOD PERFORMANCE]:Integrated circuit technology and SMT mount technology and manufacture a new generation of optical switch devices, with delay, broadening,external synchronization, anti-interference, high reliability,working for regional stability and self-diagno [AFTER-SALES SERVICE]:During your use, if you have any questions, you can contact us by email, and we will do our best to bring you a better shopping experience,So don¡¯t worry at all, please choose us.I wish you a happy life