Automatic swing or Sliding gate operator is a mechanical device used to open and close a gate, such as one at the end of a driveway. There are two main types of electric gate openers hydraulic or electromechanical, these further split into the following categories, worm (or screw) driven, arm openers and underground openers. Automatic gate operators can be programmed to open and close with a wireless transmitter (Remote control). A low Voltage Automatic Gate opener can also be fitted with solar panels to ensure function during loss of electricity or blackouts