Only a warning light and a push button.
And, IIRC, it has one of the longest lived sensors, and fairly cheap to replace.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."