1. The LS108 Spectrum Transmission Meter is designed for precise measurement of transmittance and rejection rates 2. Equipped with a 395nm violet light source, a 430nm blue light source, and a visible light source 3. This innovative device features a three-in-one optical path design, enabling simultaneous measurement of visible light, blue light, and violet light transmittance 4. The LS108 Spectrum Transmission Meter measures UV400, providing insights into the ultraviolet protection capabilities of eyewear 5. With a clear 480 × 272 px color LCD display, the LS108 Spectrum Transmission Meter presents results in an easily readable format