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: Can I wash this hat?  Are the lights and batteries removable?
Document: The lights and batteries are small but put out great light. I was pleased to see that I can replace the batteries and the label tells what type of battery to get. Hat is attractive and the lights are not visible nor do they add weight to the hat. great idea,
The look and feel of this hat are much better than expected, especially at this price. The lights are very bright and easy to turn on and off. Batteries are included and can be replaced. I highly recommend this product  The brightness of the lights will make working on anything that requires illumination much easier. Also great for walking your pet after dark.
I purchased this unique hat for an older adult who has just about every tool, gadget, and novelty one could imagine. He was delighted with this hat. It came with batteries and worked well. I would recommend this hat to anyone who has an older gentleman to buy a gift for.
He works at night, uses his flashlight and this is a smart addition to his arsenal. We just have to make sure we have extra batteries when we need them. Hat fits as expected and is good quality.
Only one of the lights worked on the hat we received. It was not possible to get a replacement, only to get our money back. So we had to package it up and arrange for a pickup. Amazon did refund our money promptly but I would rather have had a functioning hat.
My son is a house inspector whose work often takes him into dark spaces!I saw this hat online and thought it would be helpful for his job.The lights are brighter than I had thought,which is wonderful!He really likes this hat,which will make his job so much easier and safer! !
Fair price, fast delivery, and works great. Person I bought it for uses it almost daily and has only needed to change the batteries once.
This 3-led version is terrific! (We also tried out a 2-led version that wasn't as awesome). I love the 3 settings (close up work, distance lighting, and all lights blazing). It's like a headlamp for those of us who can't handle the "dork-factor" of regular headlamps! The lights are bright enough to be really useful, the battery and switch are totally discreet/unnoticeable, and it's a good quality hat to start with. Love it!
The hat worked as advertised. We used it camping and it worked great for walking and cooking at night. I did not like the size of the battery pack. It wasn't as thin as I hoped and did leave a bulge on the side of the hat. It wasn't uncomfortable, but did not look very good.UPDATE:After 3-4 camping trips the lights are already starting to dim. I'm surprised as I fell like I've been conserving the battery as much as possible.
This hat was originally purchased to use for an emergency team a friend is on. I then decided I'd also get one for me for camping and it was one of the best ideas I've had. It has super bright lights and it great because it has three different lighting angles making it great if you are walking at night or to find a bathroom. My friend thought it was great for her emergency exercises and a lot of the people on her team wanted to know where they could find one.
Answer: yes