Features 6 Set: The kit contains 6 pcs mechanical endstop limit switch and 6 pcs control cables for your use, support for RAMPS 1.4 board. Wide Compatibility: The optical endstop is a reliable stop switch solution, suitable for any type of 3D printer and other CNC or 3D tools. High Performance: Designed according to the light transmission principle, with no loss, no noise and longer service life. Sensitive Trigger: The trigger is sensitive and quiet, with high repeatability and no mechanical collision. Easy Installation: The limit switch board is easy to install on your printer or CNC tools, simple to use, practical and functional. Specification: Item Type: Optical Endstop Material: PCB Operating Mode: Mechanical Working Voltage: 5V Switch Type: Limit switch Adapting Version: For RAMPS1.4 Package List:6 x Optical Endstop 6 x Control Cable Package List 6 x Optical Endstop 6 x Control Cable