I chose these models as they most closely resemble the FitBit brand at a fraction of the cost. Arrived quickly (I'm a Prime member) and packaged nicely. The only difference for me is the connector on the band. The FitBit branding in the right image is made from the same material as the wristband, while the one on the left is made from hard plastic. I haven't had any connection issues and they stay locked in place. A piece of hard plastic broke off one strap, but it still snaps into place. For the price and variety 3 I think it's worth it.
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