On another note, that seller sucks. I tried to make a deal with them for an 8664A signal generator they had listed on fleabay for a great price. Then at some point in the proceedings after I had called to talk about it, they jacked up the initially quoted price way up suddenly and acted like they were doing me a huge favor because their cal/repair lab "really didn't want to work on it". Translation: all they have in stock is broken and they don't give a shit. I didn't return their subsequent calls. 0/10 would not do business with them again.