FlyWithCE Flight Recorder - As far as I am aware, this unit is not
longe
manufactured.
So in US, the only alternative to a fully fledged IGC Recorder is th
FlyWithCE Flight Recorder FR300 (which isn't a Flight Recorder, but
Position Recorder).
All this information is available from https://www.fai.org/igc-
documents
FR300 - recorders are still for sale on the manufactures website. They
are very simple to use, just turn it on. Charging is via any USB port, I
have tried to flatten the battery on one, but mine runs for 12+ hours
before needing changing.
http://www.flywithce.com/