P3TRA215CL features SE215 Sound Isolating Earphones, all-metal components with optional receiver recharge ability, and more advanced receiver controls The P3TRA215CL is part of the PSM300 wireless systems family PSM300 Stereo Personal Monitor Systems deliver reliable wireless freedom to every corner of the stage; patented Audio Reference Commanding ensures the clearest sound, with ultra-low noise and no artifacts

Super 6mm Dual Dynamic Drivers -- Use frequency division technology to pump out bright treble and deep bass respectively. It has ultra high voice resolution, which can better present the sweet or hoarse voice and other details Full bodied audio immersion -- Wider resolution and enhance the medium and high frequency output range. Tuned the ES2 drivers to not only sound great but also deliver long term audio output. Noise isolation and Ergonomic comfort design -- In-ear wearing with great flexibility and smooth solicone can isolate noise better. Perfect fit with 3 sizes of ear-buds that won't fall off. (XS/S/L size for your choice.)