The game controller can be contracted left and right, compatible with most mobile phones, Work for 4.7-6.5inch phone, Enhance hand comfort, the round shooting game makes your hands no longer sore. Gaming Experience Improvement - Help with gaming operation more flexible. Made of high quality material, ergonomic design, very durable Flexibility, precision, comfort, easy to control. The 2 fire and aim button key can be flipped How to Setup: 1.Start your game, and clicks the Settings-Control-Customize; 2.Move the "FIRE" button to the top of left corner; 3.Move the "AIM" button to the top of right corner; 4.Adjust the shoot and aim buttons under the touchpad，of the cell phone game controller; 5."Save" your settings.