PRODUCT ADVANTAGES: 1. Exquisite body: precision cutting process, as thin as 33mm, feel as round as jade, condensing the beauty of modern design 2. Rear 3.5mm standard headphone expansion port, comfortable in the ear, not disturbing others 3. Small and portable sound purifier that can be carried anywhere 4. Adjustable sound volume, volume 45 to 75DB, each gear is 5DB PRODUCT PARAMETERS: Product name: White noise sleep aid Lithium battery: 3.7V 1800mAh Power adapter: AC100-220V 50 60Hz DC5V 1A Dynamic current: 200mA Quiescent current: 20uA Product size: 15.2 14.9 3.7CM Packing size: 18.3 16.9 6.7CM Product weight: 450g Rear headphone jack: 3.5MM Sound Level: Level 7 Timing: Level 3 Speaker: 66MM Sleeping sound: 20 kinds Color: white PACKING LIST: Host 1 Manual 1 USB cable 1 NOTICE: The above parameters are design parameters, there may be slight errors, please refer to the actual productHELP YOUR SLEEP: Healthy music sleep aid, natural sound, gentle and soothing without stimulation, suitable for most people to sleep and enjoy a good sleep time at all times. COMPACT PORTABLE: The sleep sound machine is small and lightweight It easily fits into your purse, Bag or suitcase making it easy to bring your sleep sounds with you wherever you go. BLOCK BACKGROUND NOISE: White noise machines block noise to improve sleep, concentration and comfort. Helping you experience tranquility in any situation. SMART TIMER: Our sleep sound machine includes 3 volume adjustment levels, you can also set a timer between 15 30 60 unlimited duration, minutes to control how long you listen to your device. 20 SOOTHING SOUNDS: We've included all different kinds of white noise, Help you relax and fall into an even deeper sleep. This device is suitable for student children, elderly, adults alike.