Functions as a vehicle power cable
Customer Reviews:
MSN direct receiver 
Works great. Easy to use, just plug in and then activate on your pc. A little on the expensive side though.
It can be more useful 
I had this receiver for almost a month now with my NUVI 760. It somewhat helps me through traffic jams but not very useful many times. Here are my complaints:
1. The FM signal coverage is usualy poor in areas that are not heavily populated. I live in a less populated area. I have to do long commute to work everyday. By the time I get strong enough signal for the traffic update, I can not change my route already. So make sure both your work place and home are covered with GOOD signal strength otherwise you will get nothing either coming out of work or home.
2. The live traffic is usually 20-30 minutes delayed. Unless the traffic jam is a real bad one that will last for more than an hour, otherwise you may get a warning of traffic jam that is not there any more or you may run into traffic jam without any warning.
To be fair with MSN direct, that TMC traffic report is also delayed usually. While MSN direct also have weather report, movie time, and nearby gas prices, TMC traffic only has traffic report, not to mention that TMC traffic cost $60 per year and MSN direct only cost $50 per year to maintain.
So it is useful to some extent, but definitely need more improvement, although I dont know if that is possible!
MSN Direct Traffic Receiver for Garmin Nuvi 
I’ve been using this traffic receiver for a few weeks now with my Nuvi 750 in the Detroit area suburbs and I have been very satisfied so far. It automatically routes me away from traffic problems and I believe have saved me on my commute time. The only complaint I have is that it takes a few seconds more (about 30-60) after the satellites lock up before I get my traffic info displayed on my Nuvi.
Very Nice 
I needed an extra one so that I can cable it inside my dash. But if you do that it won’t work. So you have to leave the cable on top of your dash so that it can pick up MSN Direct. MSN DIRECT IS THE BEST!!!!