Fangrui Product Details Description/features: 1.the Ls163 Window Film Transmission Meter Is Expertly Designed For The Precise Measurement Of Optical Properties In Various Transparent Materials Such As Solar Films, Laminated Glass, And Automotive Glass. 2.this Device Is Essential For Manufacturers, Auto 4s Shops, And Beauty Stores, Offering An Easy-to-read Rotatable Display And Immediate Test Results. 3.advanced Optical Measurement: Capable Of Measuring Vlt (visible Light Transmission), Uvr (uv Rejection), And Irr (infrared Rejection), Ensuring Comprehensive Assessment Of Material Transparency And Protection Levels. 4.enhanced Display Features: Features A 128*128 Dot Matrix Lcd That Can Rotate In Four Angles, Allowing For Clear Visibility From Any Position. 5.efficient And User-friendly: Equipped With A 6mm Test Slot, The Meter Provides Instant Feedback Once Materials Are Inserted, And Includes A Hold Function To Lock Data On The Screen. Specifications: Uv Peak Wavelength: 365nm Visible Light: 380-760nm, Conform To The Cie Phot