Polsen HPC-A30 Closed-Back Studio Monitor Headphones Studio, Field, Mobile & DJ Applications | 50mm Drivers Closed-Back for Isolation | Pivoting Ear Cups Padded Adjustable Headband | Single-Sided 9.8' Cable Includes 1/4" Adapter | Output Optimized for Mobile Devices In The Box: 1/4" Adapter, Limited 1-Year Warranty