North Shore Commercial Door stocks a lineup of Digi-Code remote radio transmitters that are compatible with Multi-Code and Stanley garage door openers (1982-2011). You'll find one-button, two-button and three-button remote transmitters in various sizes. Our smallest Digi-Code one-button keychain transmitter measures less than 2.5 cubic inches in total size, making it convenient to carry any time, anywhere. Two-button and three-button transmitters offer the convenience of using the same transmitter to control two or three different garage doors or gates. All of these transmitters offer 1024 codes (multiple sets for multi-button units). They operate on battery power.