All the limited info on the batforblind site leads me to believe this is the latest implementation of Dr. Lesley Kay's ultrasonic devices which he's been promoting with limited success for nearly 40 years.
The real questions rremain, how much noise interference are willing to put up with in traveling to get information that you can't do much about. All the garbage about seeinng like a dolphin or a bat is mumbojumbo as those beasties have large portions of brain made just to interpret the ultrasonic return data and we don't. I don't think this thing is on the cane, even Dr. Kay should know better than that. Many of his devices were worn like glasses and some wher hand held. The arguments about the ultimate usefullness of such devices need to be had after considerable experience, which I've had! and over a coffee or a beer. not on this list. I note AFB tried to sell some version of the Kay device for a couple years and it is on there latest clearance at reduced price list thus implying nobody wants them for real. Use your ears, that's the best idea and you can eat to recharge batteries. Tom
