Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: What type of batteries does this use and does the unit come with any?
Document: I needed this unit overnight for a Christmas present. I ordered this Metal Scanner late one morning and it arrived early the next afternoon. I own an identical unit, works like advertised. I used it for finding nails in the walls, but I even use it as a Pin Pointer when out METAL DETECTING. It will light up when it gets within about 3/4 of an inch from a coin in the ground and beeps and turns blue on nails in the wall. Highly recommend.
I purchased this unit to check used lumber on my jointer. So far so good.
There have been so many times I wish I could detect metal inside walls, I've lost count. This little unit seems to do it all. Finding metal framing inside walls, piping, rebar, the tiniest nails and screws. I think I will find many more uses for this metal detector. It is very sensitive and well made.
I recently bought the Zircon m40 to find the nail pattern in the ceiling to establish the strapping location (and direction) and the joists. This unit does a fantastic job of finding all the nails and in the pinpoint mode, will locate them exactly. It only takes a bit of work to mark the location of nails and develop a pattern that quickly identifies location and direction of the strapping and the joists.
We were remodeling a client's bathroom. Asked her if they wanted grab bars installed - so we could properly prepare the wall for bracing. Of course, both husband and wife said no, &#34;We don't need those&#34;. We said OK.  Not two weeks after we finished, the client wanted a grab bar installed, at the urging of their children.This unit worked splendidly. It found the screws we used to install the wonderboard with no problem.
ARRGHH! Even though my nail heads are deep under at least a couple layers of plaster, this unit finds them solidly.By the way, I did also try the &#34;Biary Innovations MSFL-T1003 Magic Stud Finder Plus with free Steel Ruler and 3 Targets included&#34;, also bought from Amazon, and it did not work for me on my walls. It was unable to latch on to anything, the nail heads were too deep.
It works well and am happy with it. I have used it for detecting studs by locating the fasteners but got it to check lumber I salvaged from an old house so I don't chew up my planer blades.I do like the ability that I didn't realy care for too much for either way upon research of the product before purchasing, that this device has but that I now think may come in handy. This is the ability to literally detect a single nail or fastener behind a coat of paint and spackle.
This is the only stud finder I could find that would come close to finding studs in our old house. Our house was built in the 40's when they apparently didn't think too highly of putting studs 16 on center. Studs in our house seem to be placed anywhere from 14 to 20&#34; apart, and regular stud finders couldn't penetrate through the plaster. Every so often I'll run into a section of wall that I can't really get any signal on this finder, but it's pretty rare.
I bought this scanner because my family had purchased an older home that had plaster and lath construction and the normal type of scanner would not properly work to find hidden objects, etc. This worked great to locate the nails and studs . It helped to be able to hang items on the walls without damaging anything.
Just another gaget that does not work! It should not be that difficult to use so operator failure should not be relevant.
Answer: yes