Viofo Cpl Circular Polarizing Lens Filter For A129 Hex (75mm Long) The AVS C4 alarm is

The AVS C4 alarm is designed to be operated from your car’s factory remote plus it can control other factory features such as window roll up (vehicle dependent)

Radio bezel modifications may be necessary

1in X 1-1/2in X 1/32in (22g) Spacing Washer - 100 Pack Description

Surface finish - External taper: Ground

Rolled edges for added strength & stability

Viofo Cpl Circular Polarizing Lens Filter For A129 Hex (75mm Long) The AVS C4 alarm isThis Viofo CPL filter behaves very much like sunglasses for your eyes on a bright sunny day. It eliminates glare from the dashboard, getting rid of unwanted light reflections. The filter clips over the lens housing and the lens can be rotated to best suit the camera's mounting position in the vehicle. This CPL filter is an optional accessory (dash cam is not included) and compatible with the following Viofo models. A129 Duo Single A129 PRO Duo Single