Bluetooth connects your phone and car kit so you can make and answer calls safely while driving. Hands-free calling uses the car kit speakers and microphone. And it works even if your phone's not docked. Clip the extendable microphone to the sun visor or a-pillar in your car to bring it closer. With less background noise, your conversations will be even clearer. A built-in 2 watt speaker brings quality audio to your car. Hear hands-free calls and navigation instructions loud and clear with sound boost. The cradle can be adjusted to clamp from top to bottom or side to side. The choice allows you to grip your phone without blocking the micro-USB port or pressing any buttons. Fast charges your phone while you're on the go.