Brand Elecfreaks Model Mech Endstop Quantity 1 Color White + black Material FR4 Features Mech Endstop is a compatible module of Arduino can match w/ io of Arduino mainboard; Also can be used in RAMPS of 3D printer Specification 3 cable wire connector; 5V input power; S signal output; Working voltage: DC 5V Application Arduino teaching DIY project development SCM learning and experiment Other Mechanical switches are less complicated to implement and cheaper than optical endstops because they do not require a circuit board and only use 2 wires for connecting the switch. Pull up and down resistors can be put close to the main board. You can use contact switches and contact-less (usually magnetically actuated) mechanical switches. Contact-less magnetic switches are called reed switches. They are proximity switches that close (or switch over) if a magnet comes close enough (usually 1mm or less) and open if the magnet moves away. Reed switches are used as sensors in home alarm systems to detect open windows and doors. English Manual/Spec Yes (E-format) Packing List 1 x Assembling module