Features: 1) IR wireless stereo headphone with noise cancellation 2) Ear cushion designed for premium wearing comfort 3) Reduces outside noise by 90% (10dB),Reduce ambient noise by 80% 4) Ergonomically design for maximum,comfortable listening experience 5) Up to 20dB of noise cancellation; effectively, reduces aircraft or subway engine noise 6) Larger 40mm driver with clear sound and well defined bass Specifications: 1) Carrier frequency: a) Right channel: 2.8MHz b) Left channel: 2.3MHz 3) Audio model: stereo 4) S/N ratio: 70dB (minimum). 5) Speaker type: 40mm Mylar 6) Cone impedance: 32ohm 7) Power output: 100mW 8) Noise reduced: 70-1200Hz 9) Distortion rate:<1% 10) Power supplied: 2 x AAA Batteries 11) Cable length: Detachable 1.2m 12) Plug :3.5mm 13) Weight :150g