Three hot shoes on the top, Two Arri locating holes and The 1/4 and 3/8 screw holes all over the fuselage which can be connected with microphones, video lights, GOPRO, mobile phones and other photographic equipment at the same time. Compatible with 7.9" - 9.7" iPads (iPad mini, iPad mini2, iPad mini3, iPad mini4, iPad Pro, iPad Air2, iPad Air, iPad). Spring stretching makes installation more convenient and fast, knob locking and silicone glue bonding protects the iPad from loosening and scratching. Aluminum alloy fuselage, manufactured by pure CNC process, more effective protection of the iPad in use. Ergonomically designed for a comfortable touch.