Suitable for all Oral-B round head electric toothbrushes. Includes: IO4 IO5 IO6 D12 S12 S18 D10 D16 D17 D18 D19 D20 D29 D34 D36 / OC18 OC20 / D12013 D12013w D12523 series / Professional 500 600 1000 2000 2500 3000 4000 5000 7000 7500 3709 3728 3737 3756 4736 4717 4729 4733 6500 8000 8850 8900 9000 9000s Genius 6000 8000 et Incompatible Models:Oral-B Pulsonic Series Electric Toothbrush,Oral-B IO7 IO8 IO9 IO10,Philips Sonicare Electric Toothbrush and other brands of electric toothbrushes 【Attention】: Please first confirm that the shape of the charging interface at the bottom of the toothbrush matches the appearance of the interface of this product. The charging base is equipped with power-off protection, high-voltage protection, and made with fireproof and waterproof materials， Can ensure the safety of you and your family provides induction charging,Simply place your toothbrush on the charger to charge it, and the power will automatically turn off when you pick it up Incompatible Models:Oral-B Pulsonic Series Electric Toothbrush,Oral-B IO7 IO8 IO9 IO10,Philips Sonicare Electric Toothbrush and other brands of electric toothbrushes