DETAILS

• This add-on door sensor works with the myQ Smart Garage Hub to monitor and control a second garage door opener.
• This version of the myQ door sensor is only compatible with the new myQ Smart Garage Hub by LiftMaster Model 821LMB
• Replaces both 821LM-SENSOR and 821LMB-SENSOR and can be used as a replacement for either one
• Also known as: 821LM-SENSOR 041D7924-1