BSK-100 is a Bluetooth speaker phone that supports six different levels of audio volume for both Headset mode and Stereo Headset mode. Also, the volume of the earphone is slightly lower than the volume of the loud speaker. If users want to answer a call directly from BSK-100, they simply press the “Talk” button for less than 1 second. If the cell phone that links to BSK-100 supports auto-answering, BSK-100 will take the incoming call automatically without the need of pressing buttons. BSK-100 can make the user’s life safer and more convenient when they are driving and want to talk with others by cell phone. The back clip makes it easy to wear on your clothes.