Product Description Features: 1.High efficiency goose pipe design, adjust angle at random,convenient for use. 2.Combination of high power BLUE led. 3.Tunable blaeching time with microprocessor-controlled timer presets. 4.Digital indicator with audio feedback. 5.Smart auto-select power: 100 to 240 Vots AC .50/60 Hz for globle use. 6.High Speed Multi-Arch Teeth Whitening System. 7.Small base size design, easy to carry. 8.High Uniformity of Light Output. 9.High sensitive infrared remote control setting function. 10.Enclosed disposible sheath,prevent cross-infection,clean and convenient,let patient feel relieved. Dental Teeth Whitening Light Denatl Teeth Whitening Machine is a cooling light device could emit specific wavelength, the light irradiate a special whitening agent which is applied on the surface of the teeth so that teeth become whitening. Angle Can be Adjust High efficiency wall conjoined sliding structural design, adjust angle freely and convenient to use. A multi-functional high-sensitivity touch electronic display with audio feedback, easy operation. Easy to remove yellow stains caused by tea, cigarettes, coffee, wine, and soda Read more Specifications: Input voltage:100-240V, 50/60Hz Broad Spectrum: 430nm ~ 520nm(Host lamps) Light Output power: Up to 2000 mW/cm Max. Working Radius: 38cm/14.96in Weight: 4.8kg/10.58lb Max.Working Radius: 50cm/19.68in Easy to Use Enclosed disposable sheath, prevent cross-infection, clean and convenient, let patient feel relieved. Simple, light and handy molding design. Package Included: 1*Main Body 1*Power Cord 2*Glass 10*Mouth Sheath 2*Mouth retractor 1*Remote control 1*User manual Read more Q:Does this come with cheek retractors? A:Yes. QHow many watts of this teeth whitening light machine? A:40w. Q: Does the light itself whiten the teeth? A: It needs whitening gel to work with. Q:How many sessions to whiten teeth to a great white color? A:Maybe 1-3 sessions. Read more