Designed to fit most smartphones, the ND64 6-Stop ND Filter from Kase provides a 6-stop reduction in exposure, which allows the use of wider aperture settings for shallow depth of field or slower shutter speeds for motion blur. This filter is built using optical glass and attaches to your smartphone using an included L-shaped bracket with semi-permanent adhesive. The bracket may remain on your phone when filters are not in use and will not interfere with your phone's normal operations. You'll also be able to stack up to three filters on the bracket and swap filters quickly. Also included is a fitted storage case.