Excerpt: The K100 is a hand-free Bluetooth kit for in-car use. It has a large metal clip on the rear to hook over a sun visor and comes with a USB cigarette lighter adaptor and micro USB cable for power. It's easy to pair with a Bluetooth phone - our iPhone 4 connected automatically as soon as the K100 appeared in the devices list. There are dual microphones on the top edge which help eliminate echoes. In our testing, this worked well, and the speaker proved loud and clear.