The fastest and most effective in-office whitening treatment uses G.L.O. (Guided Light Optics) patented technology to activate and accelerate the whitening gel for maximum efficacy and reduced chairtime. Whitening gel formulated with desensitizing agent. Clinically proven to whiten with little to no sensitivity. Fast prep time and only four, 8-minute applications. No lab fees, no impressions, no bleaching trays. Chairside Whitening Kit needs to be paired with a GLO Hardware Kit or Take Home Kit. Contents: (3) 2-Patient Chairside Whitening Kits Each kit includes (2) 30% HP syringe with desensitizing formula, (2) Light-cured gingival barrier syringe, (2) Universal GLO Lip and Cheek retractor, (1) Tooth shade guide, (1) Chairside manual, (1) Lip treatment (6) Mixing tip (2) Gingival barrier application tip