RE-TIMER Sleep Glasses User Manual page 3

Setting up your device
Charging the battery
Follow these steps to charge your device:
1) Plug the charging cable into the USB
port of your (Diagram 1, a).
2) Plug the opposite end of the charging
cable into either your computer's USB port
or a USB wall adapter (not supplied).
As the battery charges, the LED Battery Indication
Light will light up on the display (Diagram 2, b).
When the battery is full, the LED will stop glowing.
If the battery is completely empty it will
take up to 3.5 hours to charge.