I got it for the color. I love it. Same size as my other bands.Per website sizing I ordered a medium. It was too large . The small fits perfectly! Wrist band only . The Halo needs a separate review.Had to buy a new one because my dog got ahold of the last one and the band itself is pricey and in my opinion, not worth the $30 but I bought it on sale for $15 and that seems reasonable. Besides being overpriced, it does fit comfortably.Exactly like the one it originally came with. My 2 complaints are that the small isn’t small enough for my wrist and since the band isn’t small enough the end catches on a lot of fabrics.I’ve used the Halo for a full month now including sleep, step/activity tracking, and voice functions. (I have not used the body function.) I wanted something without a screen that was simple and this is perfect. My favorite feature is sleep. I have learned a lot of detailed information about my normal sleep schedule, my sleep depreciation, and how I sleep when I’m stressed. The information I have always wanted to know after reading Daniel Pink’s book “When” so that I could optimize my daily routine starting with sleep. For example, I know now I typically get 1.25 to 1.5 hours of REM all before 3 a.m. on a good night. I always believed I wasn’t getting deep sleep because I woke up tired every morning regardless of hours slept. Now I can see the correlation between hours, time of falling asleep, and pattern clearly. I have been able to recognize my optimal sleep schedule over the course of a month. As for other features, the voice feature is unique but only gets snips throughout the day even on the higher sensitivity. Although it has given me a visual of how I respond to co-workers and loved ones when I am trying to be distant when I know I need alone time but can’t get it. This has confirmed what some of my peers have told me about how I react. The activity track seems quite accurate for steps and also gauges the activity levels. The gauged activity is a great representation of how you spend a day. I have increased my walking in an effort to have less secondary time. I have not used any of the work out or other educational/training features at this time.Item does what it is supposed to. Halo snaps in easily. Just seems a little small compared to the original band. Battery life was not applicable as it is just the band.NothingIf you're buying this band, then you already have a Halo, and have used this type of band before (or so I would assume, because what else will you do with it?). These fit the same as the original band that came with the Halo. I have very small wrists and usually have trouble finding things that fit, so I really like this type of band since it's easily adjustable- no need to pick a hole that is a little too big or a little too tight.I took off one star just because the photo is misleading. The volcano color is a bit lighter than the photo shows, not quite as dark a gray color. It's like a heathered black and white, which makes it a medium gray color for the main part of the band. Although I didn't deduct the star for that. The picture shows the plastic end piece and ring adjuster to be orange like the edges of the band, but they are black. I don't really care too much, but the photos should reflect what you are actually purchasing since that's what you have to go by when deciding what to purchase.