Better 1.4 High power efficiency. I also active while waiting for connects. New firmware must be uploaded to the cards by the user in order to change the actual mode. Up to 2 Megabyte Mailbox-Memory. Adjustable in 1 Hz steps.
System is sideband independant.
4 pre-defined settings. LSB must be used. 6-layer construction and compact SMD circuit. PC plug in card. Relatively cheap and slow standard chips.