Optimizer Voyage Tri-Light++: For first time use, please charge device for 2 hours using the USB cord before use. The Optimizer Voyage Tri-Light++ can be used for up to 10 minutes per application, twice daily. The device will shut off automatically after approximately 10 minutes. If you use more than one light, do not use the device beyond 10 minutes per session. Please remove the plastic protective cap before use. To power the device on, press the power button. Use the same button to change lights. To turn the Sonic Technology (Low Frequency Stimulation) on or off, press the LF button once and the green indicator light will turn on when activated. After applying a water-based serum or mask, remove the plastic protective cap, switch on the Optimizer Voyage Tri-Light++ and apply to skin. Use a gentle, circular motion (clockwise) to massage the area. Avoid direct contact with eyes. The purple light will flash 3 times when battery is low. To clean the device, use a damp cloth or antiseptic wipes to wipe the metal probe.