1. See-through window for observing sterilizing process with convenience 2. Digital timer adjusts from 5 to 60 minutes (Default 30 minutes), for more accurate operation 3. Built-in micro switch design, protect users from UV hazards 4. Chrome plated grill allows beauty tools fully exposed to the UV and Ozone 5. Intensively sterilize beauty tools including tattoo needle, eyebrow nip, scissors, and etc. 6. Perfect size for salon and home use, helps to avoid cluttering work space 7. UV resistant material for longer service life 8. Two years limited warranty (Not including UV bulbs)