The Phone Clamp with Cold Shoe from Leofoto fits smartphones 2.5 to 3.5' wide and may be used for horizontal or vertical shooting. It may be used handheld or secured to a tripod using its female 1/4'-20 thread or cold shoe mount, while a two additional cold shoe mounts may be used for attaching accessories. To help keep your phone in place, there is an anti-slip mat that rests against its back.