When was the ULX-D introduced using the 900 MHz band? Please provide details.
Introduction date: July 2015
Frequency band X52 (902 - 928 MHz) for North America, Central America, and South America except Brazil
Frequency band X53 for Brazil (902 - 908 MHz and 915 - 928 MHz)
* This range of the RF spectrum is reserved internationally for radio frequencies used by Industrial, Scientific and Medical (ISM) industries.
As a result of new governmental compliance regulations, the ULX-D1 X52 transmitter will eventually feature an "antenna boot" at the base of the antenna. The addition of this boot means that the ULX-D1 X52 antenna will not be field replaceable as it is with other ULX-D bodypacks that use a lower UHF frequency band.
In the U.S., it is feasible to operate up to twelve ULX-D X52 systems simultaneously if there are no other devices using the X52 band.