Feature:1. 3 WAVELENGTH TEST: Using a new wavelength synthesis technology, one optical hole can measure 3 wavelength data at the same time, and obtain the transmittance of 550nm, 850nm, 940nm.2. LED INDICATOR: The meter test hole has alignment indicator LED, which is used in the test process to help the hole alignment of the tested lens, accurate and reliable.3. SELF CALIBRATION: The lens transmittance meter has real time dynamic self calibration function, which is automatically calibrated to 100% transmittance after power on.4. LCD DISPLAY: The lens transmittance tester adopts a large LCD screen, and there are 3 display interfaces in Chinese and English to choose from, for clear observation.5. MULTIPLE USAGES: Equipped with USB cable, software U disk and acrylic board, professionally used for infrared and visible light transmittance testing of mobile phone lens.Specification:Item Type: Lens Transmittance MeterMaterial: Stainless SteelMeasuring Beam Diameter: Diameter = 0.5mmMeasuring Material Diameter: Diameter 0.5mmInfrared: 2 way test of peak wavelength 850nm and peak wavelength 940nmVisible Light: Peak wavelength 550nmResolution: 0.10%Measurement Accuracy: 2% (colorless and uniform light transmitting material, 0-90% transmittance)Power Supply: DC 5V 1A.Package List:1 x Spectrometer1 x Acrylic Sheet1 x Software U Disk1 x USB Cable1 x User ManualNote:1. The instrument is self testing and self calibrating when it is turned on. No test objects can be placed in the test position, otherwise the self calibration cannot be completed.2. Avoid contact with corrosive items and keep away from high temperature and high humidity environment.3. When there is no test object, the transmittance data cannot be returned to 100% situation, and the instrument can be used normally after shutting down and restarting immediately without affecting the measurement accuracy.4. Please turn off the instrument when it is not in use.5. When the interface is abnormal voltage interface, please replace the power supply.