Multifuction heads are designed for your teeth,Soft item-massage your gum,Cleaning head-remove dental calculus,Polish head-polish your teeth surfaceNote : Please re-insert the battery or replace the battery and press the open button hard if the product doesn't work . Also , read the instructions manual incase of any difficulties in using the product .Rotate/Open the cap in the buttom of kit, Remove the insulating paper, then put back batteries, and close the capInbuilt LED light help you find out the exact place of stain & clean it for just press the power buttonHigh Speed Acoustic Vibration-over 30,000 rp/min Sonic Teeth Stain Eraser revmoves years stain, polish teeth & massage gums easily