Description. The Ulanzi ST-06S Multi-Function Cold Shoe Smartphone Holder phone mount features a cold shoe with an integrated 1/4" connector, so you can attach it to the top of your digital camera to use your phone as a monitor or secondary camera, or on top of a tripod or selfie stick. With the ability to rotate 360° and tilt 180°, you can shoot in portrait or landscape at the precise angle you need. The holder works with most any smartphone and uses a ratcheting system for easy phone installation and removal.