Jabra - Extreme2 Bluetooth Headset Noise Blackout 3.0 technology; HD Voice ready technology; spoken Caller ID, battery and connection status with Voice Guidance Voice Guidance talks you through setup, pairing, battery and connection status Multiuse - connect up to two active Bluetooth devices at the same time - Transmits music, podcasts and GPS directions with A2DP technology Mono Bluetooth headset with optimized noise cancellation for reduced background noise and excellent call clarity under any environtment Up to 5.5 hours talk time and up to 10.5 days standby time - Includes USB, car and wall chargers