How to turn off the charging tone of iKou1?

If you need to turn off the power supply prompt tone, you can turn the phone into mute or vibration mode;

If you need to turn off the full charge tone, you can go to Settings-Applications and Permissions-Application Management-Click on the top right corner-Display System Programs-System Interface-Notification-Battery Full Charge-Voice-Select Mute. If you don't have this option, you need to mute it.