Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

*Built-in noise reduction circuit inverting precision ANC， it can effectively cut off 90% of the background noise.*dedicated high-quality noise-style 40mm diameter driver unit， to ensure the highest quality.*3.7v lithium ion battery，it was recharged without replacing batteries.*two modes of operation， to choose :noise reduction state (subject to a battery)， the normal state (without battery) ，it was easy to switch.*earmuffs imported sponge， soft and comfortable， long wear without fatigue.