The world's 1st silicone sonic toothbrush & largest oral care advance in 70 years, ISSA™ 3 - cleans it all. Its hybrid brush head combines ultra-hygienic, medical-grade, soft silicone for a gentle gum massage & sturdier PBT polymer bristles to break down plaque. Tongue & Cheek Cleaner keeps your whole mouth significantly cleaner for longer with 16 adjustable intensities as new features - low battery indicator LED light and 2 x stronger silicone bristles, surpassed only by the staggering 365 uses/charge - provide a lifetime of superior oral care. Smile. You've just met your forever toothbrush.