Standard 38mm AS Base: The base adopts AS structure, which can connection to the PTZ clamp base like a quick installation board. The 38mm standard size enables quick installation Multiple flexible adjustment: It can be adjusted 360 degrees or more, and can be used to adjust horizontally and vertically back and forth Screw hole connection: The bottom with 1/4in and 3/8in international standard screw holes, can connection with tripods, monopod lamp stands, handles and other equipment Knob locking phone clip: The width of the phone clip can be adjusted from 65mm to 95mm Rich expansion interfaces: The phone clip with cold shoe designing on both side, which can connection to microphones, fill lights and more