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