Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Does it interfere with AM/FM radio?
Document: Charges items as advertised. Unfortunately it causes a tremendous amount of static and interference with the radio. I have an xm radio plugged into it and that uses an FM connection and it's almost useless.
Perfect for keeping my GPS running and using the FM Transmitter at the same time. I would recommend this product.
It does work, everything works. But if you try to run a FM transmitter from the socket, be prepared for sorry quality. Works in other sockets, and no split sockets great.
It does everything I need I can use my FM transmitter and my GPS all while charging my phone! A better purchase then spending $$$ on a new stereo.
Awesome accessory! My car had only 1 12V output, and I plugged this in. Now I have two charging cables, a spot for GPS and a spot for my FM transmitter. No need to swap around! One of the most convenient items I've ever bought for my car.
The BESTEK Car Cigarette Lighter Splitter is good quality equipment. It seems to work pretty good. I can use two things at the same time. I generally use it to hook up my FM Transmitter & GPS and they seem to work pretty well together. It is overall good worth for money invested. However, I see some static comes in my FM transmitter but most of the times it works well.
Bought this item to replace my existing car charger as it would not always power on all my plugged in devices (GPS, phone charger and FM transmitter). Unfortunately I have similar issues with this device as I had with the previous unit. The FM transmitter does not always come on, but when directly plugged into the lighter socket, it works seamlessly. When I do get the transmitter powered on by jiggling the contacts, it works without issues, just a little annoying when it does not work without intervention.
I am using this in conjunction with a cigarette lighter or USB powered FM transmitter with an iPod, and cigarette lighter powered GPS. The strength of the FM transmitter is noticeably variable depending on how many other devices are in use, more devices more static. Also, powering the FM transmiter with the cigarette lighter worked better than either of the two USB ports.Overall this thing works ok, but I have not tried others so I don't know if it is better or worse than similar products.
The Unit Works Fine as long as you don't want to Listen to your Radio in your Vehicle, Destroys the reception
works great! does the job I can charge my cell phone, my bluetooth headset and listen to my satellite radio
Answer: No, it does not.