【Can be Connected to Filter】–Standard buckle type 52mm filter adapter ring, external filter can be connected when needed. You can mount 52mm ND or CPL Filters.
【Lens Protective Cover Design】–Snap-in protective cover, more convenient to storage.
【Rechargeable Battery Cover Design】–Reserve a charging port, not only can replace the battery at any time, but also can charge gopro9 or connect an external microphone.Note: The original battery cover needs to be taken out before use.
【Microphone Booster Pad】–With this cage, the Mic will not show up in the image when shooting
【Storage Compartment Design】–With this microphone adapter storage compartment, your camera can be connected to an external microphone