Fn + Esc can be used to switch between media and Fn keys.Because it is an English keyboard, it may cause problems with typing the symbols when used with JIS.Battery life depends on backlight settings.For proper operation, please update the connected host device to the latest OS and make sure subscription is enabled.For Windows, pairing through the control panel.If Bluetooth pairing is not perfect, please try to repair the Bluetooth device once to charge the keyboard, to eliminate Bluetooth interference, try reset the SMC on Mac, Bluetooth module reset.Japanese and English conversion: Windows: Alt + Shift, Mac: Command + Space Quick Guide and FAQs visit Satechi Help page.