1: Make sure your device supports Qi wireless charging. If not, an extra Qi wireless dongle is required.
Scan the QR code below and it will show you whether your device supports Qi wireless charging.
2: Turn on USB output, which also activates the Qi wireless charging.
Qi wireless is turned on and off with the USB button.
3: Find the optimal Qi wireless charging position.
You know you have found the optimal Qi wireless position when the output power reaches 7 ~ 8 Watts. Please fine tune your phone's position if it's only charging around 4 Watts or less.
The Qi wireless logo on the manual indicates the optimal wireless charging position (Please note actual Qi-equipped Omnicharge doesn't have this marking on the unit). The red circle area is where the Qi transmitter coil is located.
The range of the optimal charging area varies depending on the size of the receiver coil of your phone. Some phone models have small receiver coils, and can experience sudden interruptions after few seconds of charging. This is because of minor alignment deviations between the transmitter and receiver coil. Please fine tune your phone's position until it gets stable wireless charging, or use a separate Qi receiver with a larger receiver coil.
Here's a demo video of the iPhone with a Qi receiver for positioning reference.