Decent sound quality. Very poor manual. Audio files seem sub par.
I was intrigued by a sound machine that also displayed the temperature and humidity.  And, this product does indeed prominently show that information. Maybe the next innovation will be incorporating a clock with an alarm (with option to sue the various sounds), which would be fantastic. But, the temperature/humidity works as advertised.<br />There are few buttons, which would normally indicate ease of operation. However, in this instance, it could use at least one more button. There is a power button, a long press turns it on/off. Below that button is a control for volume. Unfortunately, it the only button for volume control. You cannot selectively increase/decrease volume. You need to go to full audio before you can begin lowering. Separate buttons for up/down makes more sense on a sound machine. At the very least, some manner to control the direction of volume.<br />There is a time button, that allows selection of 20, 40 or 60 minutes, with the default being no timer setting.<br />On the right side of the display, the top button has a lock icon. This button will lock the settings.  Press this button and a single tone indicates lock state, another press with 2 tones is unlocked.<br />Below that button are two buttons, that give access to the categories and sub-group of audio files.  The speaker system is surprisingly good for a sound machine/night light. Unfortunately, the audio/sound files do not seem to be the best quality or wise selections. For example, the water sounds are not soothing. One sounds like water dripping, which may be more like torture than sleep inducing. I went through a majority of the sounds, and couldn't find any that I thought would be conducive for meditating or sleeping.<br />The manual is close to useless. Perhaps the only value of the manual is to see the listing of all 48 sounds contained in the machine. I found that most of the functions were discovered by trial and error.<br />Case in point. the manual shows that there's a button with a light bulb icon, that controls the lighting on the machine. There is no such button. But, touching the speaker grill on the top of the device will cycle the lighting scenarios.<br />Now that I figured out the buttons and lighting, I wish the sound files were better.  Based on these observations and considerations, this sound machine earns a 2.75 - 3 star rating.
Rating: 3 stars