Tone and volume is good and batteries last forever it seems
587214
Just what I wanted. I keep it on the "oldies" station and "on" about 4 hours a day. Tone and volume is good and batteries last forever it seems.
2457107
Nice Base and Treble. Made of solid material. And easy to setup. Long batter life. I played music through all day long without the batteries being depleted.
4071058
Good sound (actually great considering how small it is),  Runs for hours on a charge and doesn't take up much room.
2091613
Bought one for my first daughter and it lasted 3+ years of constant use and being taken on the road.  Good white noise sound and music is pleasant.  Night light is also good - - not too bright.
1460560
Small but mean. The sound is clear, the base for it size is good and the battery last a long time.
3626309
The battery life on these things feels infinite, I charge 'em maybe once a week and use all day everyday.

Can't really speak to the sound quality as I don't know much in that regard but to my ears they sound great the microphone works and the passive noise isolation is pretty good.
2150213
Rugged, good sound, long batter life great price.  Thank you.
2898238
Sounds great, battery lasts forever, and haven't had any problems at all. Small dents on the side, but that isn't a big deal for me.
4873798
Sound quality is great and better volume than other bluetooth headphones I have tried.  Only concern is getting the right size tips picked out for long term comfort - because with the long battery life, these may be in your ears for several hours at a time.
1952796
The speaker produces a nice sound and the battery lasts for hours.  I use this every day for 3 hours at a crack and I recharge it every 3 or 4 days...just because I think it should be time.
1201911
I never leave home without them. Perfect volume and long lasting battery.
3542926
Sounds great and the battery life is very good. Amazing volume for its size. Looking into getting another for linking.
3990984
quality, easy to use, sound quality exceeded my expectation, batteries seem to last forever.
2632370
Ive had these for about 3 months now. The battery lasts forever. I use them for about 3 hours a day and they last almost a week before a charge. The sound quality is very good and the fit is nice.
4705079
I've had this speaker for a while and I'm satisfied for the most part. The main reasons I bought this was because of the three inch drivers and replaceable batteries.

I've been into headphones and speakers for most of my life and larger drivers generally have a wider range. Most other bluetooth speakers less than $100 have tiny drivers in comparison. The sound is pretty good if you don't have unreasonable expectations, although the treble can get a bit sibilant at higher volumes (I have sensitive ears). There is a bass port on the back and I've found I get the best results placing this in front of a wall which allows the sound to bounce forward. I stated that the other reason I chose this over other speakers was because it uses regular AA batteries, here me out! Grab a set of 4 quality rechargeable batteries with this and you're set. Most other bluetooth speakers have a built-in battery which lasts between 5-10 hours and will degrade in play time in the long run. A set of batteries in the D100 will last you a while (manufacturer estimated at 25 hours). The throw-away batteries that came with these speakers lasted me almost three weeks of daily play time at medium to loud volumes. SUP?

The main reason I bought this was for when my friends play outdoor volleyball, BBQing, and any other outdoor activities. For my purposes the D100 is a great fit. Loud enough to be heard all the way across a volleyball field and the long lasting battery ensures that the music won't cut off in the middle of an intense match.

It's not all rainbows and cupcakes though. While it's well put together the materials used don't feel very durable. The mesh cloth that covers the drivers could be punctured at any time and the finish on the body has a few annoying scratches from when it was left in my friend's trunk. Also, the bluetooth connection quality could vary depending on what you're pairing it with. When connected with my ancient Cowon S9 mp3 player (bluetooth 2.0) the audio sounds really compressed, the connection cuts out, and the volume cannot be changed on the device. Using it with my phone (Optimus running android 4.1.2, bluetooth 3.0, son) I have none of those issues. Using a fairly current device and you should be fine. Another thing to consider is the size. It's definitely not as portable as a small Jambox.

Overall this speaker punches above its weight class and is a good purchase at a VERY reasonable price, highly recommended.
1856095
I purchased this for my wife who wanted a Bose bluetooth speaker for a long time. She loves it and is now constantly listening to music all over the house. The sound is good and the battery lasts 4 hours or more. We keep it on our kitchen counter for normal use and it doesn't take up a lot of space. I use it on occasion and like it as well. It came well backed and was really easy to sync to a phone. Would purchase again if we ever need a second one.
3160653
I have this and  the product is great.  My batteries last forever.