You know, you're probably looking at your rear-view mirror quite often while driving, so why not just integrate a 4-inch GPS nav unit up in there?
That's what DSUS Technology of China offers with their new DS-400GB rear-view mirror GPS navigation system.
The high tech touch screen monitor features a hands-free bluetooth module to pair up with your phone, integrated speakers, SD/MMC memory card expansion slot, and a USB port.
The fold-out GPS receiver is from SiRFStarIII, OS from Microsoft, and the CPU is from Samsung.
The rear view camera is automatically activated when in reverse gear.