Perfect Replacement: Replacement charging base for Oral-B iO Series 3/4/5/6 electric toothbrushes. Wide Compatibility: Compatible with Oral-B Pro models S12, S18, D10, D12, D16, D17, D18, D19, D20, D29, D34, D36, OC18, OC20, D12013, D12523, D12013w, and Professional series 500, 600, 1000, 2000, 2500, 3000, 4000, 5000, 7000, 7500, 3709, 3728, 3737, 3756, 4717, 4729, 4733, 4736, 6500, 8000, 8850, 8900, 9000, 9000s, Genius 6000, and 8000. Charger base fits Oral-B round-head electric toothbrushes. Please verify your model matches this listing. Easy to Carry: Toothbrush charger designed for Oral-B, operating voltage 110-240V/50-60Hz. Lightweight, compact, and portable, ideal for travel. Waterproof Base: Fully sealed, waterproof design made from insulated ABS material. IP67 rated for water and dust resistance. Suitable for use in bathroom and humid environments. Remains functional even if submerged in water. Safety Induction Charging: Easy-to-use inductive charging base. Place toothbrush on charger to begin charging; automatically powers off when removed. Provides convenient and safe charging experience.