Not quite as I expected
First... the most disappointing aspects...<br /><br />This is not a white noise machine.  It has a variety of noise settings.  I found some of them prevented me from relaxing.  I certainly wouldn't use it to help me sleep.  The first/default noise actually sounded like the unit's sound system was broken, and I perceived noises that sounded like voices.  The water and storm noises were anything but calming.  Some of the sound settings bother my dog.  She whines when I play them.  But that's okay as I don't find them relaxing.  The water sounds... one sounds like water is flooding, the other sounds like the sink is dripping.  The lullaby sounds might sooth a baby, or it might keep them up as they're not soothing to me.<br /><br />The description says "USB Charging".  That would imply to me that there is a battery that can be charged.  But, not only isn't there a battery, but there isn't anywhere to add batteries.  That makes this almost useless as a "travel" device.  You have to connect this via the USB cable to a phone charger or computer.  There is a hole next to the USB-C socket.  It looks like it might be an alternative power socket, or for an external speaker.  There isn't anything on the unit to describe what it's for, and there isn't anything in the "User Manual"<br /><br />I used quotes around "User Manual" above.  I don't expect too much documentation as the buttons and usage are pretty intuitive.  However, what is being called the user manual is a 3x4 inch piece of paper.  One side has a picture of the unit and some specifications. The other side has the warranty information and a very brief (one or two word) description of the buttons.<br /><br />I don't actually find anything positive to say about this "White Noise Machine".<br /><br />Update (2-4-2022):  I thought I would give an honest attempt to use the "White Noise Machine" to aid in sleeping.  Based on how I felt about the sounds while I was awake, I felt there might be one or two settings that might useful as white noise.<br /><br />I was surprised.  The two noise settings I thought might be useful actually weren't.  White noise is supposed to be constant and consistent.  Most of the noise settings of this unit have a lot of variability in both pitch and volume, making them totally useless.  There was one noise setting, I would describe as crickets and frogs that did have more consistent and constant sounds.  It reminds me of what my yard sounds like during the summer.  As the result, I was able to fall asleep faster.<br /><br />The volume settings on this White Noise Machine aren't sufficient.  If you're trying to sleep in a construction zone, and you're using a white noise machine to block that level of noise, this might be sufficiently loud.  I don't need it to be that loud.  I only need to mask the pops and creaks that my house makes.  I was not able to set the volume low enough.  I had to cover it with a towel to muffle the sound as the lowest volume setting was too loud.<br /><br />It's still unclear to me why this unit wouldn't come with it's own power supply.  The specs call for a 5V 1.0A supply.  Most of my older phone chargers are smaller, lower power.  I was able to find one that provided 5V 1.0A.  It's a good thing I kept that charger when I got rid of that phone.
Rating: 1 stars