Features:It using 22AWG wire, copper wire inside is very thick, can be resistant to current 2A, 300V voltage. An insulating layer over a wide range of temperatures, up to 80 degrees. Is the common connection of thin copper wire can not match. Not easy to pull off, plug it convenient, for ease of use, plug the other side to do the one, you can use the direct plugBoard Size: Approx. 39 x 16 x 7mm / 1.54 x 0.63 x 0.28 inchCable Length: Approx. 70 cm / 27.56 inchConnection Description:Red line connecting VCC (ramps of +)Connect the black wire GND (ramps of -)Green Line connection SIGNAL (ramps in s)Tips: Under normal circumstances, the system must be configured to at least three mechanical switches.Package Included:3 x 3D Printer Endstop Switch