Chinese accessory company NiSi has started taking preorders for its new Prosories P1 Smartphone Filter Kit, a camera filter system for smartphones. The P1 Kit includes a phone clip, medium graduated neutral density filter, polarizer, pouch, and holder. As demonstrated in the video below, the system involves attaching a mount over the phone's camera, then sliding a square filter into that mount.

The P1 Kit's filters are made from optical glass with a nano-coating, according to NiSi, which says its clip is compatible with most smartphone models. Users can rotate the filter within the mount to adjust its angle, and also use a polarizer with the filter when necessary.

The company doesn't provide the P1 Kit's filter size, making it unclear whether any of its other filter products are compatible with the mount.

The NiSi Prosories P1 Kit is available now for $40 USD. To learn more or order yours, head over to the NiSi website.