Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Is the rate of air flow adjustable?
Document: This air pump is surprisingly good. It is very portable and is able to hold an air tube and an air stone right inside of the air pump itself.
The Marine Metal bubble box works great as a air pump. I would recommend it to anyone. Five stars easily!
I needed an inexpensive battery-operated air pump for my minnow bucket. This unit works great. Compact, quiet, and easy to install.
I ordered this and another air pump for my minnow bucket. This Marine Metal Bubble Box Portable Air Pump works well and seems to be what I need.
excellent pump, takes a lot of air and the bait stays alive longer, the air strip so strong that if you put a bait myrtle at the bottom of the bucket air force lifts.
Compact unit with separate storage areas for hose and air stone (hose is rather short so use in larger containers not convenient...but you can purchase a longer hose in virtually any pet store).
I'm highly recommending this product . This system is lightweight , quiet & simple to use . The packaging doubles as a water tight barrier for the system . Increasing safety and usage options . System comes with the tubing , air stone & small weight . Just add your own ' D SIZE ' Batteries !Perfect for transporting an aquarium or for live fishing bait ! Excellent product for the price $$!
have not used yet but looks cheap. I say this because you have a power of two d cells and holder is not insulated. Salt water will destroy the connections. And then the pump motor is the same. So I sprayed the motor champber with varathane and tapped springs just the tip to secure a current flow and spared rest. Then silconed motor part but just put a strip of clear tape on power part. should work?
this work very nice, you can buy it with your eyes closed!!! i had like 100 sardines alive for 3 days with this little machine!! !
i just received this .put in batteries worked lile it should  timely response sending i hope it holds up with use
Answer: yes