The Sound Oasis Sound Therapy System - Model 550-04 will give you a peaceful sleep, drown out irritating noises, creates a peaceful atmosphere for falling asleep easier and is used as a tinnitus therapy to relieve discomfort.  You will find this sound therapy machine creates your very own sound environment conducive to relaxation, sleep and improvement of everyday life. The perfect tool to fall asleep easier, get higher quality sleep, enhance concentration, and feel more alert and comfortable throughout the day!  You wil love the "gradual off" volume reduction for a peaceful decrease in sound volume.  Sound Oasis Sound Therapy Machines also incorporates the world's only "sound card" technology which enables you to add new sounds to your Sound Oasis unit by simply inserting a memory card containing 6 different sounds. (You can purchase additional sound cards above) 

An omnidirectional reflective speaker projects sound from the back of the unit for rich, deep sound and the unit can be conveniently mounted to a wall, used flat on its back, or in an upright position for minimal use of tablespace.  You are sure to find relaxation and better sleep with this sound therapy machine.

• 6 authentic built in nature sounds: ocean surf, stream, rain, white noise, summer night, wind - Listen to sounds below
• Worlds only sound card technology for adding more sounds
• Digital playback technology and extra long sound tracks for the most realistic sound reproduction
• 4 position timer: continuous, 30, 60, 90 minute
• Rotary volume control with gentle off.
• Memory button replays last sound.
• Powered by 4 "AA" batteries (not included) or AC adaptor (included)
• Headphone jack

lauri -
Any way you can seemail me a copy of my invoice? I liked the sound spas very much. We will be ordering more