233621 H501 Active Noise Cancelling Over-ear Headphones with Inline Microphone and Carrying Case, 50 hour Battery Time (Wired / Space Grey) Engineered for frequent air traveler, H501 noise cancelling headphones block out the rumble of jet engine and bring you a peaceful and quiet air trip Stereo Headphones - Features with two 40mm-diameter NdFeB magnetic drivers and frequency response equilibrium technology for rich bass, powerful and balanced sound Comfortable around ear headphones - Adjustable headband, rotatable ear cups, premium memory foaming ear pads for all-day long wearing ANC headphones for iPhone, iPad, iPod, smartphone, MP3, laptop, PC and More IMPORTANT NOTE: 3.5mm detachable MIC cable is made for iPod iPhone iPad. Inline microphone compatibles with both iOS and Android devices. BUT remote control ONLY compatibles with iOS system devices