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 lamp part adjustable up and down? I want this for needlework.
Document: This headlight is now essential part of my night running gear.
This headlamp shines light out of my head. I like the adjustable angles, and the 2 settings to reduce light or brighten depending on the situation. Assembling took longer than I would have liked. I don't see why it can't come already assembled.
Great battery life. Drop testing made me feel confident taking it hunting w/ me, though I did carry a spare. Good light for walking, terrible if you need to see something at a distance because it essentially has no focus capability. If it had a lenses with an adjustable light cone, it would be the perfect headlamp.
We bought this for my husband for his job. He does HVAC work and needed a light to shine into tight spaces that didn't make him use one of his hands. He needs them both to work on the units so this is perfect. It's really adjustable and comfortable. He uses it at work all the time. I know it would be great for crafters and anyone you needs hands free lights.
The elastic headband is decent for the cost, and it has a top strap. The top strap can't be removed unless you cut it, which bothers me. The straps are all adjustable, and will fit any size head. The 100-lumen version of this light includes a rubber strap for helmet use; this one doesn't.I like this headlight. You can get a lot of cheap, crappy headlights for ten bucks, but this isn't one of those garbage lights.
This headlamp isn't the brightest or has the most functions. In fact, it's not that bright and has only bright and not so bright. It's rugged and doesn't like to be handled timidly. I think it's good for the roughnecks out there who work with gloves on and are a bit heavy handed. I can tell the weakest part of this things is the battery cover. It's clip on, and I'm anticipating them to be the first things to break on this. I'm happy with the purchase.
The head lamp was deliver earlier than I was expecting. It came on  a good box. I will appreciate a little bit of instructions.
This head lamp is a great product for the money. It can be a little tricky for my younger children to properly put on by themselves. I would buy this product again.
It's OK but I expected better.If you drop lamp it might go out from holder and batteries might be released.Reassembly and further use is possible  but for me it's disadvantage.
The extra band that goes over your head definately prevents this head lamp from slipping off. I went on a run just to see how much it would move, stayed on and was comfortable.
Answer: yes