The Duo Wireless Charger Power Stand uses its LED lights to show charging status:

• Blue light breathing: one wireless device has been detected and is charging.
• Blue light moving from left to right: both wireless chargers are in use, and both devices have been detected and are charging.
• Orange light flashing (foreign object detection): the device on the charger does not support wireless charging or is not placed correctly. Recenter your device on the charger and remove any metal objects, such as keys or coins.
• White lights flashing: the power bank itself is charging. All four lights stay on when it is fully charged.
• Battery lights: when you turn on the power bank, the lights show the battery level and turn off after 15 seconds. Press the power button once to show the battery level again.