Feature 1.UV Rejection meter, IR Rejection meter, Light Transmittance Meter, Three function in ONE device. 2.IR Rejection meter testing 950nm,1400nm and Full IR wavelength 3.Self-calibration and auto-calibration, NO need any manual adjustments 4.Simple operation, putting the testing sample in the opening, UV Rejection, IR Rejection, Visible light transmission value of the sample will simultaneously display.