I am somewhat disappointed with these. I know they're cheap bluetooth ear buds but with the Anker name i at least expected decent sound. It's average at best. If you're watching a video theres around a 3-4 second audio sync delay. The build quality isn't that great either, the cable between ear buds are so thin and feel like they might break with a bit of force. When running they have a tendency to come a bit loose. The main purpose i bought these was so that i could use them to talk on the phone while on the train. Generally i have the in-line mic on my lip and i talk very softly. With these Headphones the mic can't reach your mouth if they're in your ear, so they don't really work for the purpose i purchased them for. In the end, i ended up just using the cable Apple ear phones. They're decent for the price, but not what i expected from Anker.