For sale GENERAL ELECTRIC MARS 25301 HALOGEN LEAK DETECTOR TYPE H-10A

with manual, 

generally in good used condition you can see on the pictures

powers up, making noise , - not sure if all in 100%

how it's working you can see here on my video

just copy and paste to google search

youtube.com/watch?v=KMh558gGzVk

thank you for looking and good luck