Upgrade your 303 Mhz Opener to a 372 Mhz!
The Wayne-Dalton 303/372 Mhz Universal Circuit Board is compatible with all Wayne-Dalton 303 Mhz and 372 Mhz garage door openers. It allows you to operate your 303 Mhz garage door opener with the newer 372 Mhz Accessories.