Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Thanks
Document: thanks its perfect sounds better than expected. It arrived quicker than expected which was perfect it was a gift that i thought was going to be late.thank you!
This box, although not as loud as a normal boom box, is perfect for tubing down the river with a group of friends.The overheating of iPhones was an issue at first but we just faced the screen away from the sun and set it in the water every so often. Problem solved.Thanks Grace Digital for an amazing piece of equipment!
yes, its that good!
we took it out a couple times and every time the volume got quieter and quieter. I had the single speaker forever and decided to upgrade to the double speaker boombox but the quality just isn't there. the single speaker is better... im gonna see what eco does about exchanges.
we ordered this for a float trip in Utah. The product was supposed to arrive well before we left for the trip, but was unreasonable late, so we didnt get the stereo on time. Amazon sent a replacement, which failed to arrive on time as well. When we arrived home both stereos were here waiting, the first one I opened worked fine, sounded pretty good, although putting the volume on our iphone completely up while turning the stereo itself up doesnt work so well.
trashnot work the 3 to buyAC / DC adapter input did not worktrashtrashtrashtrashI like my money, return my money thief
took this on a river trip with me and I absolutely loved it. I would say the only negative thing about this item is that if youmax out the volume it interferes with the music and does not sound very well. Other than that, its perfect for going to hang out with friends at a pool or etc.
this is the greatest product and actually does what it says it's going to do although I wish it was Bluetooth capable and also had an AC plug or compatibility.....also it would be nice to have a small fan within the waterproof compartment to keep the contents somewhat cool...phn seems to get really hot!! !
this is definitely waterproof, i have put it out in the rain and after it stopped i left in under our gutters drainage pipe for about an hour and it still worked put it in the sink, and then for the final test the full submersion i took it in the pool and held it under water for a good 30 seconds and it still works. it was also much louder than i expected which was a big plus.
this is a great little radio. more of an mp3/docking station as it doesnt play radio. took it last weekend to a river tubing trip worked great no joke i put the whole thing underwater and it still played did this a few times down the river cause other tubing was didnt beleave it was waterproof. one major drawback....the plastic cover draws in the sun and within 30 min of floating in the open sun my iphone shutdown due to high temp.
Answer: No, it doesn't work as a backup battery