mobile gaming controller trigger is designed to take your gaming to the next level. No more sore or numb fingers due to a lack of grip on your phone. Our trigger will improve your in-game reaction times and win you countless fire fights. Game with greater comfort and performance! Setting Instruction 1. Start your game, and press 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 cellphone game controller; 5. Save your settings. Unique Design *Long and short metal buttons, six finger linkage buttons are more rapid to fire *Metal trigger is more stable and sensitive than the plastic game triggers. *Buckled back clip provides a secure grip during intense gaming. *Compatible with your phone case and screen protector. Cautionary Tips *Install the control firmly your phone prior to gaming. *Different phone models may require position adjustments to the controller. To get as secure of an installation as possible, try to have as much of the anti-slip pad touching the back of your phone as possible. Note : 1.Our mobile game controller supports 1cm thick phones including phone case thickness. 2.Some iPhone devices may be hot after long time playing, so we suggest you remove your phone case before playing games.