Sound Oasis is a unique sound relaxation product that allows you to create your very own sound environment. By bathing your room with the world's most authentic sounds of nature, Sound Oasis blocks out irritating noises and creates a peaceful atmosphere so you fall asleep easier, get higher quality sleep, enhance concentration and feel more alert throughout the day. Sound Oasis is also a proven tool for coping with the effects of tinnitus. Sound Oasis represents the next generation in sound conditioners by incorporating the world's first "sound card" technology which enables users to add new sounds to their Sound Oasis unit by simply inserting an optional memory card containing 6 different sounds. Incorporating a multi position timer (with 4 selections: continuous, 30, 60, and 90 minutes), a unique "gradual off" volume reduction feature for a peaceful decrease in sound volume, a rotary on/off volume control, headphone jack and an off resume button that stops the unit or repeats your last played sequence at the touch of a button, Sound Oasis is a perfect bedside companion. Sound Oasis also features an omni directional reflective speaker that projects the sound from the back of the unit for rich, deep sound. The unit's unique design allows the unit to be mounted to a wall, used flat on its back, or in an upright position for minimal use of table space. Sound Oasis can be powered by 4 "AA" batteries (not included) for traveling, or by an AC adapter (included) for convenient use at home or the office.