1. The window film transmission meter has simple operation and the measurement is fast. Just put the measured object into the test slot then the visible light transmittance, ultraviolet and infrared rejection rate will be immediately displayed on the interface. 2. The instrument has small size and it is very convenient to carry out; the test card slot is 8mm wide, which can directly test the car windshield. 3. The instrument has a data lock function. After the test is completed, press the HOLD button to lock the test data. The data will remain on the display interface after taking away the tested material. 4. LS162 portable solar film transmission meter has real-time dynamic calibration function. When there is no test object, the instrument will automatically return to the original data state to ensure more accurate test data. 5. The transmission meter is powered by 4 AAA alkaline dry batteries with ultra-low power consumption. And the instrument will automatically shut down after 3 minutes without any operation. With this design, the instrument is more energy efficient.