Noise Masking Mastery: With precision volume control, the sleep machine for deep sleep drowns out disruptive noise, helping to support sleep and relaxation for all agesInnovative Solutions for Better Sleep: is focused on designing, building, and selling quality and innovative sleep sound machinesPortable Design Specs: Lightweight and USB-powered, this white noise machine for bedroom or travel measures 4.4 x 4.4 x 2.2 inches, perfect for on-the-go restorative restSleep Timer Feature: Equipped with a convenient sleep timer, this sleep device can be set to automatically turn off, ensuring energy-efficient use while you drift into peaceful slumber Classic: This compact sleep sound machine from offers 20 non-looping (non-repeating) sounds, including fan sounds and white noise, to foster a tranquil sleep environment or provide speech privacy Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.