1. Compatible mobile phone sizes

NOTE: REMOVE THE CASE BEFORE USE.

Mobile phone thickness: less than 10mm

Mobile phone width: 66mm-85mm

Mobile phone length: less than 170mm

2. Compatible mobile games

Games whose virtual buttons can be dragged.

3. Power On/Off

The power switch is controlled by a lever. Power-on: pull the lever, the F4 controller is turned on, and its 2 indicators light will be on in green, then will be off after 5 seconds. Power-off: when the lever is fully retracted, the F4 controller is turned off.

4. How to install

5. Turbo mode

6. Off-screen correction

During using, if the button or F4 controller does not work properly, try to turn the mobile phone screen off and then on to fix the problem.

7. Battery indicators

Low battery: When the F4 controller’s battery is lower than 10%, the 2 indicator lights will flash red quickly.

Charging: the 2 indicator lights will flash red slowly.

Full battery: the 2 indicator lights will stay on.

FAQ

Does it support the mobile phone with a case ？

It is not recommended to use the mobile phone with a case, the maximum support for very thin mobile phone case, and the final thickness is not more than one centimeter.

Can it be used with F1 ？ 

Use with F1 is not supported.

Does it support xx game ?

The game itself needs to support dragging virtual buttons.

Why is the button not responding ？

1. Please turn off the screen for calibration.
2. Please make sure that the virtual key is moved and aligned to F4 contact.
3. Please enlarge the size of the virtual key.