Secure, Universal Fit: 3 Pairs S/M/L Ear Gels Included For a Secure & Comfortable Fit Enhanced Bass: Designed to Produce Next Level Audio With Clear Acoustics & Deep Bass Built-In Volume and Track Controls: Take Hands-Free Calls With The Built In Microphone and Easily Toggle Through Your Playlist With The Built-in Track Controls Plug & Play Design: No Adapter Needed for USB-C Devices. Simply Plug These Type C Headphones Into The USB-C Port And Stream Your Favorite Music