It is a 3-axis telescopic stabilizer with a built-in extension for any size smartphone with pro features: auto face follow and object tracking, programmable motion time lapse, intuitive user controls, auto panorama[ Compatibility(Testing Lists in Landscape Mode): iPhone 5S/6/6S/6 Plus/7/7 Plus/8 Plus/X,Huawei P9/Mate 9/Honor V10, OPPO R9S, Samsung S7, Nubia Z9 mini/Z17,Mi 6. Vimble 2 is compatible with iPhone series, Huawei P9, MI 5, MEIZU MX 6, Samsung S7 and other Android phones which width is between 57 and 84 mm; 1.Single tap: Switching between panning mode (Default mode) and lock mode. 2.Double tap: Panning and tilting mode. Entering panning mode by single-tapping in this mode (Default mode). 3.Triple tap: Switching to either rear camera or front camera in Vicool App. It does not work without the App. 4.Quadruple tap: auto-rotation mode, perfectly fit for time-lapse. You can set the start and the end and the route of rotation by hand in this mode. When setting is done, gimbal will be automatically rotated following pre-set route in constant speed, which was set in App before. The gimbal will stop at the end point and enter panning and tilting mode after finishing the movements, or you can exit this mode halfway by single-tapping function button or double-tapping trigger button (Check more details in manual). Function