The Model GT-30 3-Channel Genie Compatible Visor Transmitter is a three-button transmitter that sends a unique code for each button. Typically, one button is used to operate a community access gate, another button can activate the individual’s garage door, and a third button can control an additional door or other device.
Features

• Three buttons and three channels to operate three independent gate, garage, and/or other access operations
• Test/operate LED
• Black case color
• Molded design to comfortably fit the hand
• Easy access to battery compartment
• Anti-code-theft, rolling code technology
• Visor clip supplied
• Power: Two CR2016 lithium batteries
• Frequency: 390 MHz
• Codes: randomly selected from over 4 billion codes with each button press