The sound oasis deluxe sleep sound therapy system is the world's best white noise machine. It is proven to help you sleep, relax, and renew. Sound oasis plays back nature sounds, music and sound therapy sounds that coax your brain to match these frequencies and enter healthy states of sleep or relaxation. Sound oasis deluxe sleep sound therapy system is the best and most advanced sound machine in the world. Combining unsurpassed, high fidelity sound reproduction with an exceptional offering of sound machine and clock radio features, sound oasis deluxe bathes your room with authentic sounds of natures, fall asleep easier, get higher quality sleep; experience relief from tinnitus; enhance concentration; feel more alert throughout the day. Product features include: 145 sound possibilities: 24 main sounds and 5 mix sounds. 3 speakers (including subwoofer) result in the world's highest sound fidelity available from any sound machine. Backlit, dual 12/24 hour clock with 3 alarm sounds, digital calendar and brightness control. Patented sleep enhancement technology helps lull you to sleep. Proprietary doctor developed 'bio-sync' sound helps realign your body after traveling or stressful days. Timer with 4 positions: continuous, 30 min, 60 min and 90 min. With gentle off plus a nap timer. Voice memo recording allows you to record your own voice message or sound. Bass/treble control allows you to precisely adjust the tone of sounds. Memory button replays last sound. Headphone jack connects to your headphones or a speaker pillow. Dual voltage adapter (we will ship with your required outlet prongs)built-in technology to control your bedside lamp for light therapy (optional controller required). Sleep enhancement feature helps lull you to sleep. Voice memo recording allows you to record your own voice message or sound. Memory button replays last sound. One size.