Here is a review of the Remote Slew Control written by renowned visual viewer, Howard Banich:
"I was lucky enough to have been a beta-tester for the cordless
hand controller and was able to test it for two months of observing in
varying conditions in the Pacific Northwest. I've had the standard hand
controller for a little over two years and found I was using it less and
less because I didn't want to mess with the cord. As soon as I tried the
cordless version I was hooked. I could control the most minute movement
of the scope while holding the cordless hand controller in my pocket.
I particularly like function that enables each direction button to be
toggled to either a fast slew or a slow slew. This beats having to press
two buttons to get a fast slew as on the original hand controller. This
translated to using the cordless hand controller for most of my observations
- essentially any time I had the magnification over 200x on my 20"
f/5 I used the unit. The higher the magnification the most useful it became.
The most extreme example of this was on one exceptionally steady night
at Steens Mountain, Oregon when I was able to use 1250x on the Ring Nebula.
The Ring nearly filled the field of view at this magnification and the
cordless hand controller not only made centering the nebula a snap, but
it was also great fun to sweep along the perimeter of the nebula to soak
in the subtle details. Galaxy clusters were just as much fun - slewing
from one galaxy to the next while keeping my hands in my pockets was a
blast. Two other nice features was not having to worry about stepping
on the long cord of the original controller (done that a couple of times)
and not having to wind up and put away the cord when breaking down the
scope for the night. I only unplugged the power to the receiver, put the
controller in my observing vest pocket and they were ready to go for the
next observing session.
is a link to the Cordless Remote's User Manual.