I am so not impressed with this product. I bought it to use in a music classroom and it worked fine when I plugged it into my computer at home but when I put batteries in (yes, they were in the right way) it didn't work. Then when I plugged it into the computer it worked but it cooked the batteries. Luckily it made a sound when it shorted out and I was able to unplug it and take the batteries out. There was obviously an issue with the battery connection. Won't buy again