... ,USBTransmittanceWith glass,Optical transmittance above 90%;Do not with glass,optical transmittance is 100%Explosion-proofGlass explosionproof, ... ~ 50°CPower supplyUSB wireDriftWithout drift,do not change with the environment.Durability>50000 hoursOperation systemWin2000\WinXP\Win2003\Vista ... . Host computer was built-in,stable performance,maintain with low cost.2. Can be used when the power ...