Ferrari AAV-1LFH009K Cavallino T350 Active Noise-Cancelling Headphones - Black (Discontinued by Manufacturer) High efficiency 40mm Full range speaker driver with closed-back design which seals the ear pads to prevent loss of music dynamics - Frequency response: 20-20,000Hz Active Noise Cancellation (ANC) powered by 2 x AAA batteries, reducing unwanted ambient noise. Robust machined crafted metal arms and housing to ensure durability and quality. Ear cups and headband are trimmed in the finest leather to ensure ultimate comfort, with ultra-soft ear pads constructed from enhanced breathable materials. Anti-tangle and detachable incline remove cables (3-button Apple microphone; 1-button microphone Android, Windows, Blackberry and most mobile devices; plan non-microphone cable) trimmed in woven fabric, 6.3mm stereo adaptor and airplane adaptor included.