SHARPER IMAGE SBT558GYSL Bluetooth Wireless Headphones With Mic and Volume Control 12 Hours Play, Universal for Android iPhone, Hard Case Silver Enjoy rich stereo sound with these High Performance Wireless Headphones. Delivering superior audio with enhanced bass and crystal clear highs Connect the headphones to any Bluetooth enabled device to wirelessly control playback and even answer phone calls with the built-in microphone Foldable for portability, the soft, padded ear cups provide comfort while blocking out ambient noise, and the headband is fully flexible and adjustable for a perfect fit. Hard carrying case included A long-lasting rechargeable battery keeps your favorite music going for hours, and a smooth rubber finish and reflective accents create a bold look to suit your style. Keep it in its own sturdy hard case for safe storage and transport Technical specs: Driver unit 40mm, built-in Bluetooth chip, playing time 12-14 hours, standby time 18-20 hours, battery 400 mAh, operation range 10-12 meters, frequency range 2.4-2.48 GHz, built-in mic, aux port 3.5mm, volume control/music. Connectivity Technology: Wireless-Bluetooth