ZIYOU LANG Bluetooth/2.4GHZ Wireless Keyboard - Model: ZIYOU LANG K68 - Connection Method: Bluetooth/2.4GHZ - Switches: Red Switches - Key Layout: English Layout - Other: Hot-swappable Please check the condition in the photos. Only what is shown in the photos is included. The box, etc., is not included. Bluetooth Connection Method: Turn on the power switch, and press and hold FN+W/E for 3 seconds. The W/E key indicator will blink, indicating that the keyboard has entered Bluetooth pairing mode. The W/E key will turn off when pairing is successful, and you can use it. 2.4 G Connection Method: Turn on the power switch and insert the receiver to use. Alternatively, press and hold FN+Q for 3 seconds. The Q key light will flash rapidly, insert the 2.4 G receiver, and the Q key will turn off when successful.