predator IV sight ?

[stealthydeerhunter]

Got my new toy installed and set-up today.
Why dont all treestand hunters use one? this is the absolute best money ive spent since i started hunting. ive missed more deer than i can count due to misjudging yardage. this thing is sooooo cooool.its a pendulum sight but has adjustment for arrow speed wich ive not seen before.ive tried two others that are in the garbage now (couldn'teven bring myself to sell them on ebay id feel bad about some guy as frustrated as i was )

[JDH_bowhunter03]

I have one of those too. They're awesome.