Features: 1. Compatible with Dash Cams, Easy installation and . Note: Only the filter is included. 2. Easy Installation, Gently screw the CPL onto the dash cam lens, then rotate the filter to achieve the appropriate effect. 3. CPL Polarizer, Reduces glare and reflection from vehicle windshields while enhancing contrast. 4. Double Sided Multi Coated HD Optical Glass, With a reflectivity of less than 0.1%, the filter ensures superior image quality and clarity. 5. Water Repellent & Scratch Description: 1. Type: Polarizing Filter 2. Model: 37mm Driving Recorder Filter 3. Applicable Products: for E1/E2/E3/E1 Lite/N4 Pro Driving Recorder Material: metal + glass colour: As Shown Package Contents: 1 x CPL Filter 1 x Filter Case 1 x Cleaning Cloth 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.