Audio Technica ATH MSR7BK SonicPro Over Ear High Resolution Audio Headphones Black Time an tru Compatible with the Philips Avent MWTFQNQ87 Compatible with the Philips Avent Anti Colic Baby Bottles and converts them into a Straw Cup Reapply at least every two hours Driver Diameter 45 mm Springing from Audio Technica's rich heritage in professional audio the ATH MSR7 Over Ear High Resolution Audio Headphones are designed to reproduce Hi Res Audio allowing users to hear music the way it was intended The over ear headphones are outfitted with exclusive 45 mm True Motion Drivers which utilize lightweight voice coils a custom mounted printed circuit board and specially designed diaphragm to improve transient response and minimize sound distortion for rich detailed audio reproduction The ATH MSR7 headphones also feature multi layered air damping technology for extended mid to low frequency response The housings designed to "mirror" the full shape of the ear are constructed of an aluminum magnesium mix layered to provide a lightweight rigid structure that reduces unwanted resonance Three precisely placed vents within these layers work to control air flow and improve dynamics The over ear headphones' highly flexible swivel design with soft memory foam ear pads and headband ensure lasting comfort even during the longest listening sessions And with three detachable cables (standard 1 2 m (3 9') and 3 0 m (9 8') cables plus a 1 2 m (3 9') cable with in line controls and microphone for compatible smartphones and other devices) the ATH MSR7 can provide Hi Res Audio anywhere you go