Frequency Response: 20 Hz 16 kHz. Transducers: Single high-performance balanced armature per channel. Precision machined metal bodies; high performance Balanced Armature micro-drivers 4ft reinforced detachable cables with 3.5mm Gold plated stereo Plug and MMCX connectors Noise Isolation: 35dB using silicone ear tips, 42dB using foam ear tips Noise Isolation: 35dB using silicone ear tips, 42dB using foam ear tips