Rocketfish RF-EX7 Mobile - Bluetooth Headset Designed for use with most Bluetooth-enabled mobile phones for simple hands-free conversations Supports Bluetooth 2.1 + EDR for clear sound PureSpeech noise cancellation technology offers optimal call clarity for both the caller and receiver Touch-sensitive volume controls allow for easy volume adjustment Up to 4 hours talk time and up to 100 hours standby time for extended conversations