I purchased one of these displays last year for my GL1100. I'm glad I only paid $25 CDN for it as it has been nothing but trouble. I often have to reset the time, the voltage is usually displaying crazy values (18 to 28 V) and the thermometer always reads about 5 to 6 degrees C too high. Also, the LED lights for night time display are too dim to read the numbers at night and they do not turn off when I shut down.
It is a shame that it does not work as described because the three functions it provides are exactly what I wanted.