IOGEAR's compact USB Bluetooth transmitter is 5.1 compliant. Version 5.1 technology brings ?direction-finding? that allows Bluetooth devices to precisely pinpoint the physical location of the device. 5.1 supports Angle of Arrival (AoA) and Angle of Departure (AoD) methods to determine the distance and direction of the signal. This version can pinpoint a devices' location within a few centimeters. This offers a more stable and reliable connection.