Feature: 1. HIGH PERFORMANCE LED LIGHTING: The color changing lens tester is equipped with 15 LED lights that emit low heat and consume minimal power, ensuring energy efficiency and for prolonged use. 2. EXPANDED TESTING RANGE: With 15 UV LED lights, this UV tester offers a wider coverage for testing a variety of lenses, making it a comprehensive tool for evaluating the effectiveness of blue ray light blocking or photochromic lenses. 3. BLUE RAY BLOCKING DETECTION: Utilize the tester to assess whether glasses or lenses effectively block blue ray light or undergo color change under different lighting conditions, providing valuable insights into the quality and functionality of the glasses. 4. 30S/60S TIMING FUNCTION: Features a 30s/60s timing function, conserving energy and enhancing user convenience, designed to detect color changes in lenses, this tester is ideal for blue ray light blocking assessment. 5. EASY TESTING PROCESS: Simply press the blue ray blocking lens onto the designated area of the test card and place it in the testing area. The uncovered portion of the blue ray light test card (not included) will darken. Specification: Item Type: Photochromic Lens Detector Material: ABS Purpose: Used to test whether glasses/lenses block blue ray light or change color. Package List: 1 x Photochromic Lens Detector 1 x Adapter