check out a white's coin master, the white's will be easier on batteries than the 250, and give you a better option.
the f2 is a 5.9 khz. the 250 is a 6.5 and the white's is 8.0 the white's gets you closer too nickels AND gold and be a little bit pickier on smaller treasures plus hammers coins
for a 179.00 that a good deal listen to a white's then go listen to the others and you will see that the white's sound a lot like a detector should...happy picken...