"PORTA100HF for Human Use" is compact & light weight. ?Size: 160 mm(H) x 161 mm(W) x 300 mm(L) or 6.29 in(H) x 6.33 in(W) x11.81 in(L) ?Weight: 9.2 kg or 20.3 lbs kV and mAs selectors adopted a rotary switch system for easy and quick selection of kV and mAs. APR switch stores 8 examination parts and corresponding exposure data (kV/mAs) in order to avoid an annoyance from refering these data to the radiographic chart every time. Automatic mAs control technique keeps always a real kV selected on the panel in order to obtain an expected picture result even at the place where a certain drop of the line voltage occurs due to the high impedance such as from the use of an extremely long extension cable. Please see a PDF leaflet for details.