Make gum protector completely hard within 2 minutes.
Items:
1. One pair of Whitening light with earphone
a. 26 LEDs, Blue wavelength: 460~490nm
b. Powered by 3 AA batteries and could work for abo...
Power supply: Input AC 110V and 220V, 50/60Hz
21 Osram blue and green POWER LED light units.
LED life expectancy : > 50,000hours
Magnifying lens: 3 x magnifying / Light intensity: 9000MCD
Blue ...