I use them for my daily work out. Passt gut. I see the glue. I love everything about these lights. I do also look forward to using it with a small group of people for audio conferencing when back in the office as it will give some additional flexibility in breakout areas. --------------------?Features:--------------------Similar to the 800s the 520 features audible prompts for all selections including preset audio modes (e. This was an awesome price and seem to be well built overall. if you are bass heavy and want more, they have a bass up feature that really hits. 5 in heels, sneakers in 6. Super cute, super comfortable, and a great price.