I have used the cheap Chrony and had a lot of inconsistencies with light changes.
The Pro Chrono Digital has been pretty reliable for me. Overcast days with no screens is always reliable. High sun with screens is reliable. Low sun is iffy sometimes. I had the shade line creep over the roof I was shooting under, so the rear window was in the shade and the front window was in the sun. It added approx. 300 FPS to my pistol load speed.
I didn't even notice the shade line until I got the wild readings
The remote option is not cheap, but probably would be worth it.
I test pistol loads and use a 9-10' distance. The speed readout on the P.C.D. is clearly visible at that range, but having to go downrange to change strings is a pain in the ...butt. ("Can we make the range safe?")
A two-wire jack could probably be rigged for a hardwire switch that would work to change strings, just haven't used it often enough to be worth the effort.
Wooden Dowels of the same Dia. work for sky screen holders, "just in case".
Did I tell you? Two ways to avoid shooting your Chrono out of season: ALWAYS USE A TARGET ALIGNED WITH THE CHRONO. ALWAYS ALLOW FOR SCOPE OR RED-DOT HEIGHT OFFSET"