Acaa 2.0 Revolutionary Sound Coaxial Dual-Driver Technology Delivers High & Low-Frequency Sound Directly To Your Ear Without Interference. Its Wide Soundstage Is Detailed And Spacious, Bass Has A Deep Punch, Mids Are Luscious, And Treble Sparkles. Personalized Noise Cancelling Fusion Comfort Fit Turn On Transparency Exceptional Clarity With 6 Microphones 8 Hours Of Music From A Single Charge Ipx4 Waterproof