DoorKing 6300 Commercial Swing Gate Opener ADVANCED FEATURES: Self-adjusting, no maintenance limits. Overlap feature for dual swing gate operation. Designed with a built-in primary and secondary entrapment prevention system. Ports for plug-in loop detectors. Two convenience outlets. Fail-safe release. Tamper detect circuit. DC Powered convenience open (optional). Gate tracker reporting output. Programming switches. Built-in reset switch. Built-in power On/Off switch.