... both arches whitened at the same time4. 6pcs high power LED, fan-cooled5. 1-30minutes adjustable timer,3 light ... easy7. Integrated type is available Specifications:1. Input power: 100-240V AC, 50/60Hz2. Light resource: 6pcs ... high power LED3. Wavelength: 420nm-490nm4. Light Intensity:6 intensities, ... timer:1m, 5m, 8m, 10m, 15m, 30m dental laser Whitening Machine