Compact Design-Smaller For Comfort Oraimo Riff features an innovative ergonomic design, and the weight of single earbud is only 3.5g, forming an exceptional experience of premium comfort. Dynamic Sound-Never Lose a Beat The rich and punchy bass along with the crystal-clear audio ensures that you can groove to your favorite music albums to the fullest. ENC 2-mic Technology-Hear the Other One Clearly ENC technology will effectively suppress environmental noise, making the person you are calling hear your voice more clearly. Open and Connect-Convenience at Your Side Open the case and earbuds will automatically connect with your device. Just set up once and you can just enjoy the convenience. IPX4 Splash & Sweat Protection-All-weather Protection With IPX4 waterproof, Oraimo Riff can accompany you through rain and workout time. No fear, all the way.