COMPATIBLE WITH: ender 3, ender 3 pro, cr-10, 10s pro and more 3d printers.
OPTICAL ENDSTOP SWITCH with 1M Photoelectric Light Control.
DIY MUST: With trigger indicator, 3 Pin N/O N/C control, easy to use Micro Switch.
WARM TIPS: Generally, the printer DIY system need at least three optical switches.
ABOUT SERVICE: Just feel free to contact for any questions or problem, we would reply you and solve the problem asap. within 24 hours.