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: iphone power cable fitment?
Document: I went to "easily snap" onto my power cable on my tv and the 2 locking tabs broke off instantly. (you can see them in the item picture) Even without much force, these things are fragile. I ended up wrapping it on there with electrical tape. Still didn't solve my noise problem but I don't think it's this products fault. However, 1/4" should be 1/4".
I bought a new iPhone and for some reason when I put it near my computer speakers, it makes an awful loud buzzing noise. I found this product, which was supposed to eliminate that noise by attaching it to my computer power cord. I tried it on my computer power cord, my speaker power cord, my usb power cord, nothing kept the noise from returning. Unfortunately, this product did not do what it was supposed to.
It fit the cable and went on easily. I did not have a great noise problem before I put it on so I don't know if it made a difference in noise levels.
Samsung tv was interfering with either my Z-wave or 433 mhz controller(dont remember which). Put this on the power cord ... problem solved...
The 1/4" aperture is much larger than a usb cable, so this product is entirely ineffective at suppressing noise on anything using a usb cable. I got it for aCAD U1 USB Dynamic Recording Microphone, and it was a waste of money.
Fits the power cords used with most electronics, and looks like it was made there. My noise problem was too large for just one to resolve, but when I added more (different model), the problem was resolved. Just from the addition of just one of these, the problem was a little less severe. If you need several, look around amazon for the best value being offered on a given day.
The device has a short hardwired 1/4 unbalanced cable and it was this particular cable that was acting as the antenna.After ordering this item and attaching it onto the end of the cable nearest the recording interface, the radio transmission is gone.I didn't measure the inner diameter but it seems that the diameter of the ferrite core is slightly smaller than the diameter of the plastic shell so other reviewers are probably right in that it's not quite 1/4".
Works as expected. I placed the ferrite core on a custom 2.5mm, male to male cable that goes between my XBOX 360 controller and the mixamp for my Astro A40 headset. It's for the mic on the headset so I can talk to people on XBOX Live. Before the ferrite core my friends would say that they heard a lot of static on my end. Then I bought this ferrite core placed it on the cable and everything was as clear as day. Nice job.
I'm probably confessing my ignorance about the physics of audio system noise abatement, but this product was recommended to me by an audio component manufacturer to get rid of a low level ground buzz. Unfortunately it was not effective. I ultimately got better results by re-orienting my audio signal and power cables. This product may work to reduce noise generated by RF interference, but it didn't help me. At least it was an inexpensive lesson!
Well made item that is useful to keep on hand for troubleshooting noise problems, and as a solution. At this price, keep two on hand.
Answer: I don't understand your question.  Pretty sure this item is too big for iPhone power.  You would probably want a 1/8 inch adapter instead.  Good luck!