1. CompatibilityThis electric toothbrush charger is suitable for Braun Oral B electric toothbrush models: D12 S12 S18 D10 D16 D17 D18 D19 D20 D29 D34 D36 / OC18 OC20 / D12013 D12013w D12523 series / professional 500 600 1000 2000 0500 30070004 3709 3728 3737 3756 4736 4717 4729 4733 6500 8000 8850 8900 9000 9000s etc. Fits all Oral B round head electric toothbrushes. Please confirm your toothbrush model before ordering 2. IP67 Waterproof DesignFully sealed IP67 waterproof design, Easy to clean with water and safe to use in water or in humid environment 3. Travel Friendly USB Port DesignSupport 100V 240V voltage input, can be used in many countries, The USB toothbrush wireless charger is compact with long cable, easy to carry, for Travel. 4. Safe Inductive Charging TechnologyThe inductive charger base makes it safe and easy to use. Put it down and it charges immediately, pick it up and it turns off the power automatically. And it also provides multi protection of electric leakage, over current, over voltage, over heating and over load, ensuring security when charging.