If you are an avid Trekker, then you know those original doors in the first series were human controlled. Too bad they didn’t have a BlueGuard from EMX. The device opens gates, overhead doors and parking barriers with only a Bluetooth enabled cellie. The BlueGuard recognizes the phone so no RFID or access card is needed. Easy to set up, it has a detection range of up to 33 feet, can handle 10 different phones, is PIN protected and watertight. Contact BlueGuard for details and price.