Bluetooth is easy to connect and has a far distance. It seems to move on its own if I set them down for a minute. Since the last review, they have stopped working. Im 58 tall Thick 195 pound and all my fat is on my stomach, so dress Im look like 6 months pregnant lol Ill been looking for shapewear that is comfortable, I read every single review here and yes, agree with most of them is super spanx you BETTER GO SIZE DOWN my regular size is large so I went medium and OMG it work, I did on 3 different dresses and as you can see ( left side with the shapewear, right side none in all pictures) big differences, . Initial reviews said 3-4 hrs of screen time should be expected. For doing the job well, that is a definite yes. However, I gave it chance, as it was flimsy at best. Battery life isnt great. Amazing deal. 5-9 and purchased a 9.