Model 4140 is a 4-button, 300 MHz visor remote control designed for garage door and gate openers. It features two sets of 10 dip switches and operates up to four separate doors or gates equipped with Multicode systems. To verify compatibility, check that your existing remote operates at 300 MHz and has 10 dip switches in the battery compartment. You can also confirm by checking the dip switch count on the back of your garage door opener unit. The remote includes a visor clip for convenient mounting and is compatible with all US Multicode gate and garage door opener systems.