This Bluetooth works. I’m a size 6-7 wide and ordered a 37wide and they fit perfectly. Came with the 2 AAA batteries the display needed. I was looking for a stand which lifted my back tire so I could work on/rotate the crank and chain, and this one did not serve this purpose. However, the soft nappy part of Velcro lost its grip after about a month and my sons sandals would come undone all the time. 5 but I got a size 5 and it fits like a 5. You will need extra tools to assemble it, tools not included. Ive recently gone back to not only wired setups (wireless, while convenient, has other compromises) but good headphones; not headsets with mic. This change my customer service style and easy to serve my customers really happy that I bought it and I will recommend it to my business partners Phone was not unlocked could it use it