... -held and fixed dual-use two design Features: 1. Simple, light and handy molding design2. Hand-held and fixed dual-use ... high power LED, fan-cooled5. 1-30minutes adjustable timer,3 light intensities, suitable for more brands tooth whitening gel6. LED screen ... : 420nm-490nm4. Light Intensity:6 intensities, maximum >6000 mW/cm25. Adjustable timer:1m, 5m, 8m, 10m, 15m, 30m dental laser Whitening Machine