There are a wide variety of controls available to operate your gates. Selection of these is determined by the specific installation, security consideration and personal preference.
Remote control radio receivers are normally installed as standard.
Some of the most common types of controllers are listed below:

remote control unitremote control unitremote control unit

Coded Access
coded pad access

Push Buttons
push button access

Audio and Video Entry Systems
Audio and Video Entry SystemsAudio and Video Entry SystemsAudio and Video Entry Systems

also available:
Vehicular Free Exit Loops.
Card or Proximity Readers.