LG Electronics Solar Car Kit HFB-500

This Bluetooth car kit sits in its own transparent plastic casing, which mounts on the windshield with the included super-duper suction cups. (I was surprised at how well the HFB-500 clamped against the glass.) I positioned the device on the far-left side of the windshield. The solar-panel side, of course, faces outward to soak up the sun's rays, and the underside, facing the driver, has one large call button (which also acts as the voice-dial button), a dedicated power button, and the volume-up and -down controls. A minor quibble: The casing's edges jut down over the volume buttons, getting in the way somewhat, so I had to fumble a bit to adjust the volume.

Note: If you live in a state where it's against the law to mount anything to your windshield, you can place the HFB-500 on your dashboard instead. That did not work so well for me in my car--my dashboard had no one good spot to accommodate the device, nor did I have a way to attach the unit there (the company provides two sets of suction cups, which stuck only to the windshield in my case). For charging purposes, you can leave the product sitting flat on your dash to soak up the sunlight, but a better option would be to bring the device with you and allow it to recharge on, say, a window sill in direct sunlight. That way, you're not leaving something in your car, which might attract unwanted attention.