We recommend using a computer, Portable Battery, or wall powered USB to charge your iSpyPen Pro. When you plug the pen into the USB port, you will notice that the indicator light illuminates.
The indicator light contains a red and blue LED. The red light will only illuminate when the pen is not fully charged and is in the process of being charged.
Once charging is complete, the red light will disappear, leaving only a blue indicator light.
Kindly note, that the combination of red and blue lights may give the illusion of a single purple light while charging.