Description/Features: 1. The switch and data lock is only one key, the operation is simple and easy to understand; only need to put the tested material into the test slot during measurement, the three test results can be displayed, and quick reading can be achieved. 2. The heat insulation film tester adopts a parallel light path design, and the test notch is 6mm. It can test thin materials such as solar films, as well as large thickness materials, such as automobile side windshields. 3. The display interface can be automatically rotated by 360°, which is convenient for reading data when testing at different angles. 4. The glass film detector has a real-time dynamic self-calibration function, and it is automatically calibrated after it is turned on. 5. The instrument has a data lock function. Press the HOLD key on the instrument during testing to lock the test data. After the test sample is removed, the data is still locked on the display interface. 6.The portable solar film tester is small in size and adopts a non-slip design, which is convenient to grasp and easy to carry when going out. 7.The instrument adopts LCD dot matrix screen with backlight, which can be used without light. Specifications: UV Peak wavelength: 365nm Visible light: 380-760nm, conform to the CIE photopic luminosity function Accuracy:±2% (Colorless and transparent material) Resolution: 0.1% Power supply: 4*AAA alkaline batteries Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour: Blue Material: ABS Package Contents: 1 * Detector(with 4 segments No. 7 battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.