This magnetic limit switch is used as a replacement for many Genie screw drive model openers. The limit switch works with the carriage to tell the door when to stop opening. If you have determined the switch needs to be replaced, you can use this as a quick replacement to get your opener back up and running. 

• Contains one magnetic limit switch with the white wire 
• The up limit switch is used at the power head end of the rail where it opens
• Genuine Genie replacement part
• Compatible with Models:  Pro99, CMD9900, H8000, ISD990, ISD995, ISD1000, 4060L, 4560