Plantronics Pulsar 590E Ultimate Stereo Bluetooth Headset Compatible with most Bluetooth v1.1 and v1.2 capable devices. Telescoping voice tube provides clear calls and discreet conversations and adjustable headband and pillow-soft ear cushions for superior fit and wearing comfort For high fidelity stereo sound and superior audio performance stereo listening, Bluetooth devices must support the Bluetooth Audio Distribution Profile (A2DP)