... / / 2.17A Wavelength range: 460-490nm for blue light, 620~760nm for red lightPower output: 26WDisplay: 2.4 Inch TFT ... in microcomputer, can be connected with the computer through the USB, update the display content.Advantages1. Not a single cold light whitening ... infrared warm light, can eliminate patients tooth acid, tooth sensitive and discomfort during the whitening, more safe and comfortable.2. ...