*ONLINE ONLY - Allow extra time for delivery. Ship to store FREE! During checkout select ''Store Pick-up'' as your delivery option.* iHome Zenergy Portable Sleep Therapy Machine with Bass Enhancement Fall asleep more peacefully with Zenergy soothing sound therapy and the meditative effects of the renowned 4-7-8 method inspired by yoga breathing techniques. The iZ2 features 8 different white noise and sound therapy tracks designed to calm your mind, lower your breathing and heart rate, and prepare your body for sleep. The iZ2 also features a convenient aux-in jack with included cable to listen to your favorite music and meditation apps. Powered by 100 -240V AC adapter (included) or 4 AA batteries (not included) for portable use.