D (default) = Right advance key is forward; left advance key is back
R (reverse) = Left advance key is forward; right advance key is back
Firmware Version 5.0, December 2012
Various bug fixes
Firmware Version 4.0, April 2012
The "Battery low" message has been removed.
The "Battery empty" message is only displayed once for five seconds when the battery has become critically low. It is advised that when this message is displayed that the device be turned off and connected to a charger immediately to avoid completely running out the battery.
Firmware Version 3.0, March 2011
Corrects a problem in some units where Windows shows the message "USB Device Not Recognized" when connecting to the USB port.
Firmware Version 2.0, June 2010
Corrects an issue that now lets the unit work properly with iOS devices like the iPhone.
Adds Human Interface Device (HID) to the protocols available from which to communicate. Note that this option is not available on Refreshabrailles manufactured before March 2010.
Corrects a problem that prevented the device from recovering from an extreme battery drain.