Model 4120 two-button 300 MHz garage door opener remote control with visor clip. Features two sets of 10 dip switches for compatibility verification and operation of up to two garage doors equipped with Multicode systems. 300 MHz frequency transmission. Hand-held design with two buttons for convenient control. Compatible with all US Multicode gate and garage door opener systems. To verify compatibility: Check that your existing remote displays 300 MHz frequency on the back. Confirm your remote or garage door opener has 10 dip switches. This model matches those specifications. Includes visor clip for easy mounting in your vehicle.