... USBTransmittanceWith glass,Optical transmittance above 90%;Do not with glass,optical transmittance is 100%Explosion-proofGlass ... 50°CPower supplyUSB wireDriftWithout drift,do not change with the environment.Durability>50000 hoursOperation systemWin2000\WinXP\Win2003 ... .Commercial organization:Big mall,Store,Chain franchise,Supermarket,Hotel,Restaurant,Travel angency,Drug store ect.2. Financial ...