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: hi everyone, does anyone know how to pair the microphone with a phone? i was able to discover it, but the PIN was not 0000 or 1234. anyone got an idea
Document: Also you will know if your batteries are gone. Actually I came here today to buy a second mike and I fancied the new slimmer version, but battery life is so important because changing them in the middle of something is not always practical so I'll stick with this model because it takes two batteries.The clip did break on my mike after lots of use so if anyone knows where i'd get a replacement??
Everyone was dancing and TALKING and WHOOPING while he was playing, so the audio on my Sony HDR-HC7 was filled with background noise, even with my external mic. I put the ECMHW1 receiver on the camera and set the wireless mic in front of the musician. I was able to walk around and get great video of everyone around the campfire, the musician, my daughter and son dancing with Samburu warriors, everything, and the audio from the mic picked up only the musician.
THis microphone is perfect. Great range and does not eat batteries. 4 stars instead of 5 because the clip broke right after I got it, was not built real strong.
I got this wireless microphone free as it was a part of the deal when I purchased my DCR-SR100. I have to admit that using this really clarifies the sound, especially when there is a situation with a lot of people and you want to hear your subject more than the background noise.First, the receiver. Its very light (2oz.) and requires no additional batteries. It is powered by the camcorder and ONLY fits Sony's "Active Interface Shoe."
Got this thing as a gift about 5 weeks ago, and my primary use of it right now is hanging it on my 3-year-old grandson. I really don't care much for the little box microphone -- I'd happily pay more for a transmitter that clips on a belt, with a little wire and microphone -- something like I use at work. Although the microphone is not really so noticeable, my grandson keeps fooling with it.
It uses to AAA alkaline disposables, and sometimes we get only an hour or so out of a pair of them. Perhaps our microphone is defective, but that seems unreasonable.What I would really like is a Bluetooth microphone with the normal small wired mic and a small battery pack/transmitter.
Highly recommend for anyone taping anything at a distance.
A must have if doing beach shots or areas where wind is a problem. Doesn't go as far as I thought. If you have used this on a roller coaster ride let me know if it worked.
I'd hate to have them run out in the middle of the play, and I have no idea if they last for 4 hours or 40 hours. If you are doing an interview, it's not a big deal because you could interrupt and pause to put in new batteries.For my purposes, I wish it was a "stereo" mic, but for the more typical use, where you mic an individual, mono makes sense.
i literally couldn't believe how well this cheap little wireless mic worked -- all the positive reviews are spot-on. but as soon as i put it on the first time and saw how delicate the connection the receiver is to the camera, i wondered how long it would last. not long, as it turns out. i have no idea why Sony needed to make the tiniest of connector pieces. i have no idea if i can return it, since it's been just over a year.
Answer: Here's what the instruction manual says:  (1) Because communication is possible only between the matched pair of this product when the product is shipped from the factory or supplied as the repair part, the same serial number should be carried both by a microphone and a receiver that enables identification of the matched pair among the mixed use of the multiple units.(2) If the approved certificate labels of the respective countries in which this product is marketed and customer uses is not attached to the product before use, ignorance of this requirement may be punishable.