1.CE 2.ISO13485 3.Sold around the world 4.12 months warranty 5.cheap Detail info: Operation modes:absorbance, concentration, kinetic, fixed time and end point Wavelength range:340-700 nm. with 7 standard interference filters. Band pass:less than 8 nm Measuring range: Photometric linearity:0.2A~0.5A±5%,0.5A~1.0A±4%,1.0A~1.5A±2% Photometric accuracy:±1% from 0 to 3.000 O.D.