The iHEARmax Sport Lock adds extra support to your hearing device. This helps keep the hearing device from coming out of your ear, and also assists in making the hearing device easier to remove. The Sport Lock can be installed yourself, or by iHEAR if ordered in advance with the product before shipping. The price displayed is for one pair (2 total quantity) of iHEARmax Sport Locks. The Sport Lock comes included with your iHEARmax device purchase. It will take about a week of daily wear for the lock to form to your ear.