Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: If I buy this product, will I have to replace the old radio system with this? Or will I insert it in the little space under the dashboard?
Document: My stock radio took a poop and i figured i buy a little higher quality. I love kenwood so I bought this radio and it made my stock speakers sound much better.
I bought this radio because it is the cheapest kenwood out there and my last kenwood died after only a few years.Do yourself a favor and buy JVC. I had a JVC that lasted 8+ years and may still be working to this day.No point in throwing good money at bad products. Look elswhere or you will just have to replace this unit in a few years.
I buy this for my husband and he love it. It's a little tricky for change the albums or carpet music in the USB.
Fantastic, affordable receiver! Plenty of features, including USB! My girlfriend couldn't be happier with her new sound system! Another quality product from Kenwood!
bought this to replace my old stereo and deck, like it alot because it has the ipod hook up and aux cord up front. tons of different colors to choose from. super easy instal with correct wiring kit with your year and vehicle. looks great, sounds awesome. happy customer
I did not need a dash adapter kit for my car, but most late model cars will. Also, get the correct wiring adapter plug for your car and wire it to the radio, then just plug your old radio and plug the new one in.
Not a bad little stereo for the money. I replaced the original factory radio in my 87 Regal Grand National, and hooked it up to 4 new Pioneer speakers. Makes a good basic replacement for a car you may not drive all the time. The remote is great, and it work well with my power antenna.
Radio is good quality, easy to install in my 2002 Mitsubishi Mirage(remember to buy a wiring harness adapter). I recommend this radio, usb works great, easy to navigate through songs.
Decent little radio for the price. Does what it says it does and has nice sound (not that I'm a qualified audiophile).
Radio has a good clear sound with adjustments for decent bass & treble response. I like the USB port as I copied my Itunes to a flash drive and listen to it that way (I don't have the right cable to plug my old iPod shuffle directly into the radio).I also like that you can select between different lighting colors as my Subaru has green dash lighting, I could make the radio match pretty close.
Answer: It replaces your existing car radio.  So you'll need to take out the old radio and most likely replace the mounting plate and wiring harness too.