No larger than a paperback book this charger has a lip around the edges so I can easily postion my phone on the charger even in the middle of the night.
Three coils means that the phone starts charging wether it's to the top of the QI or in the middle.
This is powerful enough to charge my Galaxy S8 phone WITH THE OTTER case ON.That is impressive.
Charges my phone quickly. I couldn't ask for a better charger!
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