The Sony IER-H500A h.ear in 2 Series - earphones allows you to listen to high-resolution audio in great detail and answer calls from your portable device. The headphones have 9mm drivers with neodymium magnets, which can reproduce a wide frequency response from 5Hz to 40kHz. The Sony IER-H500A comes with a carrying case, a length-adjustable headphone cable and four pairs of silicone ear tips for a comfortable fit. High-resolution audio: hear details you never knew were there Long listening comfort: three pairs of ear tips provide a custom fit designed for long listening sessions Very sensitive 9 mm drivers: The drivers are specially designed to produce a clear, vibrant sound with tight, deep bass from Beat Response Control technology High-quality cable: OFC litz wire with silver coating Answer calls and switch tracks: Manage calls and music with a handy inline remote control and microphone Thanks to the L-shaped, gold-plated, 4-pole miniplug you stay connected to your device Wear with confidence: Protect your headphones from wear and tear on the go Compatible with Smart Key app for Xperia Android OS 4.0