this fidelity research FRT-4 is quite versatile
don’t anybody buy it, I might buy my 75th birthday gift 3 years early.
I certainly won’t be buying it :-)
Even if I needed it, which I don’t, personally I would not purchase from a seller who ...
-- has more than 3300 items listed for sale at eBay, very few of which have anything to do with audio. (His "store" states that "we mainly sell Japanese figures, apparel and daily goods");
-- lists this 40+ year old item without providing any indication of whether it has been tested and found to work;
-- has more than 2% negatives among his nearly 1000 feedback ratings in the past 12 months;
-- and is overseas, which might make returning it and obtaining a refund problematical should that be necessary. At the very least you would have to pay return shipping costs, per the stated terms.
Just my $0.02. Regards,
-- Al