Residential Electric Door and Gate Operators Commercial-Industrial Trolley type-ceilling, Wall Mounts, B1-Parting, Sliding Doors Electric Operators Waterproof Trolley Type-Ceillling and Jack-Shaft-Wall Mount Explosion-proof Trolley Type-Ceillling and Jack-Shaft-Wall Mount Sliding Gate Electric Operators Swing Gate Electric Operators Trafic control barriers To control of vehicular traffic in private and public parking areas. Rolling &Fire Doors Rolling Service Doors & Fire Doors. Jack Shaft - Wall Mount Accessories Different accessories for your needs Safety Devices Reverse Systems and Sensor Entry-Exit Devices Loop Detectors, Card Reader and more Operating Controls   Modifications   Special applications   Surface-Mount EEMAC 1 Momentary-contact, single-button station can either open or close door/gate/barrier. Part No. 50405 Momentary-contact, two-button station, can open or close door/gate/barrier. Part No. 50415 Momentary-contact, three-button station can open, close, stop door/gate/barrier. Part No. 50415 Momentary-contact, three-button station with pilot light and key switch "off/on". Buttons will open, close, stop door/gate/barrier. Key switch will render push buttons inactive in the "off" position. Key removable in both positions. Part No. 50420 Also available without key switch. Part No. 50500