• Skylink Rolling Code Technology.
• Easy to program.
• Keychain style transmitter that goes with you.
• Alkaline battery included.
• Compact-size dual button transmitter can operate two garage doors with 18R Garage Door Receiver (sold separately).
• Can be used to control plug-in lighting, fan or small appliances with SW-18R Wireless Switch Receiver (sold separately).
• FCC/IC approved.
• One year warranty.

18T4 User's Instructions