Adjustable and Dismountable Swing Arm Joystick integrated swing arm allows 180° spinning, can be flicked up and fold easily. Fold it or stick it back onto the smartphone screen whenever you need it. The swing arm is dismountable into three parts with an ease providing total flexibility on your style of gaming with various options, duet or solo play with the joystick at your will. Ultra Low-Friction, Stick-On Joystick The ultra low-friction joystick with anti-slip design enables you to play effortlessly in 360°. With the conductive steel piece inside of the rubber pad, it makes possible to play with even you are wearing thick gloves. The turbine steel spring is easy to move the pad back to the center without being deformed. Now you can control your game character more precise than ever. Stretchable Grip Telescopic-boom designing grip with detents makes a great stretching space to adapt the different length of smartphones from 5.5inch (140mm) to 6.7inch (170mm) length with 4.5inch(114mm) to 6inch(152mm) diagonal screen size. It fits iPhone X, iPhone 8 plus, Samsung Note 8 and Xiaomi MIX2 perfectly. To protect your phone, the grip also has each resilient EVA pads on both inner sides to secure the position from being displaced. Easy-To-Setup GameSir F1 joystick grip is made for every gamer’s daily life, does not require any battery and signal connection to play with your smartphone. As simple as just install the swing arm first, stretch the grip to fit your phone, stick the joystick onto the screen and you go!