How do I know when the AIR PIX is charging?

When you plug the USB-C cable into a USB charger, a red light will come to the left of the camera lens.  The red light will remain on while it is charging.  When the red light is off your AIR PIX will be fully charged.       

NOTE – you cannot charge the AIR PIX while it is on.  The blue light must be off to charge the AIR PIX.