Diffuser suitable for most standard external camera flash speedlight. 2-in-1 diffuser uses the fixed velcro to fix on the speedlight, won't leave marks. This product uses adjustable design, fix it to the flash lamp holder and form a certain angle, used to minimize the photo shadow and local markers. Adjust diffuser form an Angle of 90 degrees with flash lamp holder, effectively reduce the shadow. Stretchable magic belt is suitable for the vast majority of speedlight