White Noise Machine HFD-W04, supports comfortable sleep. - Model Name: HFD-W04 - Input: 5V 1A - Color: White - Function: White Noise Machine Purchased in March 2022 to help put a baby to sleep. Thanks to this machine, the baby slept well. There is an instruction manual, but as the image shows, it's tattered, sorry. The content is readable without any problems. Includes the main unit, charging cord, and instruction manual. Please note that a USB power adapter is required. Operation has been confirmed, and it works without any problems. 【24 Soothing Sounds】Equipped with 24 soothing sounds such as the sound of a river stream. 6 types of fan sounds, 6 types of white noise, 12 types of natural sounds (birdsong, ocean waves, river stream, womb sound, sleep music box, insect chirping, summer rain and thunder, campfire sound, clock ticking, train sound, silence, water drop sound). You can choose according to your preference. 【Recommended for those who have trouble concentrating on studying or working】Shuts out surrounding noise, promotes sound sleep, helps put babies to sleep, background music for work, can be used by babies to adults. 【What is White Noise?】Moderate noise is suitable for people to calm their emotions. White noise machines hide surrounding noise and are effective in improving concentration and sleep quality. 【Volume Control & Sleep Timer】A 30/60/90 minute off timer can be set, and the power will automatically turn off after the set time has elapsed. 【Lightweight, Compact, and High-Functionality】Product dimensions: φ10.8 x 6cm Weight: 418g. Built-in battery allows for up to 24 hours of continuous playback. Compatible with earphones, memory function, and comes with a Japanese instruction manual. Also features a sophisticated metal steel mesh. The design is more stylish and robust.