Only work on Samsung devicesFREE APP and NO ADSAbout Galaxy Button Light: Samsung Button Light is simple tool help you can select how long the capacitive buttons (Recent apps and Back keys) stay light of Samsung devices. This application has many selections for backlight: always on when the screen is on, always off, default duration (1. 5 seconds) or custom time on duration by yourself from 1 to 10 seconds. If you turn on Power Saving Mode, the buttons will always be off until you turn off Power Saving Mode. Easy and simple to use, working without Root permissionImportance Note: The application may not work with Custom ROMs. Only Samsung Stock ROM can control the lighting. We would love to hear from our customers. If you have any problem, questions or feedback about this app please contact us at [firstname.lastname@example.org].