iVoice GX-7 Noise-Cancelling Bluetooth Headset (Chrome) Worlds first auto volume control headset that automatically adjusts the volume level in the headset depending on the environmental conditions, speakers voice and quality of the line connection. I-Voice two microphone works in synergy. One to optimize speech intelligibility ,the other to remove background noise Intelligent Voice Operator Voice interface enables Voice prompts functionality for audible caller ID Automatic volume control to help you hear incoming callers even in a noisy environment Sophisticated ergonomic design with versatile earhook provides users a comfortable fit