Perfect Replacement: : Perfectly Replacement 3757 charging base for Oral B iO Series 3/4/5/6 electric toothbrushes. Please don't hesitate to contact us if having any question about our charger base,we will provide you with a satisfactory solution.Thanks Wide Compatibility: : Compatible for Oral-B Pro Model: S12 S18 D10 D12 D16 D17 D18 D19 D20 D29 D34 D36 / OC18 OC20 / D12013 D12523 D12013w series / Professional 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 8000 and more. Charger Base fits for Oral-B round-head electric toothbrushes. Please Make sure Your Model Match this Listing. Easy to Carry: : Toothbrush Charger Fit For Oral B Working Voltage: 110-240V/50-60Hz. The electric toothbrush charger is lightweight, compact and portable, which is very easy to carry and friendly for travel. Waterproof Base: : Fully sealed and waterproof design, the charger is made of insulated ABS material, IP67 grade waterproof and dust-proof. You can use it in the bathroom and other humid environments. It won't be damaged and still works even it drops into the water. Safety Induction Charging: : This electric toothbrush replacement charger base is very easy to use and it is inductively charged. Put it down and charge it, pick up and automatic power off, which make it more convinient and safer when charging your electric toothbrush.