... 1 PD meter, UV,Prineter, 2.colour screen, Touch screen. auto read 3.Touch screen 4.CE.Rohs Classification AM-800 are digital ... display and touch screen lenemeter with automatic focusing working principle. Power adaptar isconfigurated ... touch LCD Interface connectors: USB, RS232 Advantage : 1. Touch screen . work more easy .2. Can contact with computer.. update ...