- This treatment light provides full spectrum UV-free (protect your eyes) to provide you with daily sunlight. 10,000 lux for effective light therapy for winter depression, circadian rhythm sleep disorders, fatigue and shift work. - USB powered and compact design - Powered by USB Type-C cable for direct connection to a computer or power bank. With a foldable stand for easy portability and storage, it sits next to your laptop, on the kitchen counter, on your desk, and anywhere in between. - Control and adjust Continuous Touch Controls - With sensitive touch control keys, 3 built-in color temperature modes (warm white/white) and adjustable brightness (2000-10000 lux). Long press the touch control button to continuously adjust the color temperature and brightness, allowing you to change the brightness and color temperature as you like, providing the most comfortable environment. - Countdown and reflective memory function - This SAD light has a built-in 15/30/45/60 minute automatic timer; we recommend starting with 15 minutes and gradually increasing to 30 minutes to 1 hour daily until you find the most effective time. All settings will be automatically saved for next use, avoiding readjusting settings each time.