Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Is the voltage requirement has 50 hz?
Document: This is a good buffer, but for the fact it does not work well at low speeds (1-3). It preforms well at high speed 4 and above. It has a good grip. If all speeds worked well it would be rated 5
I ordered One & of course i got 2 and had to pay for them both. I would love to get my money back without spending a lot on shipping the other one back. Its stiil sitting here in its shipping box. Strapped. I want my money back & will do whatever to get it right.... Thanks Darron Winters
I love it, for what it cost, it's well worth clicking the buy button. I use this everyday and can't ask for better results
Don't work to well in low speed. From 1-10....I give 8 for it. What you pay its what you got....Fast S/H. Thanks
Answer: no