The Sennheiser HD 4.50 special edition is a Bluetooth 4.0 wireless headphone featuring aptX codex compatibility and active noise cancellation providing wireless freedom of movement and exceptional sound quality.
Bluetooth 4.0 and aptX technologies deliver exceptional wireless sound quality. Connectivity Technology: Bluetooth
Noise Gard active noise cancellation reduces ambient noise levels improving the listening experience
Intuitive ear cup mounted controls for changing tracks and for making calls via the integrated microphone. Dual omnidirectional microphones
Up to 19 hour battery life with Bluetooth and Noise Gard activated and is supplied with connecting cable for battery free listening
2 year warranty when purchased from an authorized Sennheiser dealer
Frequency Response 18 22,000 Hertz Impedance 18 ohm