Your Ion should only be on when it needs to be. Finding the OFF button in a hurry can be a major turn-off or can ruin the moment. Smart Silence technology has been designed to address this problem. Using advanced Pleasure Air sensor technology, it knows when you want stimulation. Based on skin contact, it automatically switches on or off, allowing you to sit back, relax, and enjoy the moment. Never worry about any unwanted noise again as Smart Silence will turn off your product as soon as there is no skin contact. Ion features intuitive smart technology perfect for any user.