Other car components

The Bottom Line: An interesting and effective technology demonstration for a collision warning system, the AWS-4000 might make sense for large trucks in fleet operation.

The Bottom Line: For serious car geeks with an engineering bent, the Fuel Efficiency Adviser will provide a satisfying array of data, but others will be overwhelmed by the complexity.

The Bottom Line: While it is a good training tool to help motorists to drive more efficiently, the PLX Kiwi will not miraculously boost your fuel economy.

The Bottom Line: The VR3 VRBCS300W Wireless Back-up Camera is a competitively-priced, easy to install aid for getting some rearward visibility, but don't rely on it for getting into tight parking spots.

Specs: Headphones, Ear-cup, Stereo, LINX Audio, On/off switch, Volume control, A-B speaker switch, Built-in IR transmitter

Specs: Headphones, Semi-open, Black, Stereo, Volume control, 3 years Limited warranty Parts and labor

Specs: Headphones, Ear-cup, Stereo, LINX Audio, On/off switch, Volume control, A-B speaker switch, Built-in IR transmitter