The OKY3919 Limit Switch Module is an electronic part designed to be used in 3D printers manufactured by OKYSTAR. It has a solid state design and is made up of a small form factor that can be easily integrated into most 3D printer systems. The module features over 250 mW of switching power and offers up to 1.35A of current load capacity. The limit switch module also has IP-54 rating for dust and splash resistance. It has a contact life cycle up to 500,000 cycles and a max contact material of Ni-Au. Additionally, the module operates between -25°C and +70°C, with an operating voltage of 12 to 24V DC.