*How to turn on power and connect to Bluetooth (Android/iOS-iPhone,iPad) 1.Turn on Bluetooth function of the machine to be paired. 2.Put the keyboard into pairing mode after battery installation. Press the (ESC+K) key simultaneously for approximately 5 seconds to enter pairing mode. Pairing Mode: Left Red LED Flashing/Pairing Completed: Left Red LED Off 3. When Actobtk03 appears on the device to be paired, click to pair automatically. If no key responds, please contact me . I'll give you an exchange or a refund. Thank you. *Korea/English conversion method Android: Convert to Korea/English (/) conversion key (Space key right key) (Mac Pc): Press the System key and then the Space key at the same time. (iPhone, iPad) : Convert to the Capslock key or Ctrl+Space key. *Due to the shipping policy, the battery cannot be included, so it will be removed from the package and sent, and the sticker will be damaged in the process. Make it clear that it is a new product, not a used one. * If the keyboard is not working 1.Press any key as it can be all sleep 2.Check battery (AAAX2) capacity and proper insertion 3.Remove battery and re-insert. 4.Connect Bluetooth with the keyboard and the device at hand. 5.Repair (ESC+K key pressed simultaneously for 5 seconds)