If you're looking for an affordable, no-fuss, easy-to-operate ballistics information solution for your air rifle, air pistol, airsoft gun or bow, FX Airguns has just the thing: the Radar Wireless Mini Pocket Chronograph.
Theoretically i could set this 20ft away, as long as the pellet passes by, it should read?
Yes; It will read the pellets.
What units is the scope height inch, cm, or mm?
I believe its more of a bore height issue with the Impact I place it about 2 inches below and about 1-2 inches back from the tip you might need to take a few shots to find perfect placement
How many shots per session can it support and can you store info for future references?
Ive had it store up to 70 shots before I left the app and lost my string. Take a screenshot ASAP