Plantronics Pulsar 590A Bluetooth Headset High fidelity stereo sound for superior audio performance Universal adapter plugs directly into most 3.5 mm audio devices, such as iPods, to enjoy wireless stereo listening Foldable Headset, AC Charger, In-Flight Cable, USB Charger, and Travel Case included Telescoping voice tube provides clear calls and discreet conversations For stereo listening, Bluetooth devices must support the Bluetooth Audio Distribution Profile (A2DP). Devices that do not support the A2DP profile must use the Plantronics universal adapter