Keychron K4 - LED Status Overview; Function Description; Bluetooth; Wired Mode Toggle

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1. Charging port
2. Win / android Mac/iOS (OS toggle switch)
3. BT OFF Cable (Mode toggle switch)
LED Status Overview
Led Location
Function
Status
Battery Indicator
Charging
Low Batter – Blinking Red
Charging – Static Red
Fully Charged – Static
Green
Bluetooth Indicator
Bluetooth
Pairing – Fast Blinking
Paired – Light Off
Switching – Slow Blinking
Function Description
Charging
Plug the cable into a USB port and plug the other end into the keyboard port. Charging
Indicator: When battery is below 15%, a red battery blinking indicator will be triggered. A
red light will stay on while charging; Fully charged in around 3 hours, a green battery
indicator will appear.
*The Keychron keyboard is compatible with all USB ports. Please use a 5V 1A adapter or
USB 3.0 for the best performance. The Keychron K4 can be charged in Bluetooth/on/off
mode.
** This product supports up to 5V charging voltage and 1A charging current. We are not
responsible for any problems caused by improper charging.
Bluetooth / Wired Mode (Toggle Switch)
1. Switch the toggle switch to Cable option (it only works when a USB cable is
plugged in).
2. Connect our cable with your pc and keyboard.
3. Backlit will be turned on.