Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: what can you use for a charger if one does not come with it?
Document: Rates at 10+ hours on a charge (rumor has it closer to 20 at certain volume levels), and charges with mini usb (I thought it was micro usb, same as my smart phone -- was hoping to be able to use one charger for both items -- i read too quickly). I just got it this morning, came with a solid charge. It paired to my Galaxy Nexus no problem out of the box, no PIN needed.
It works when it needs to and is really simple and easy to use. The USB charger is a real plus.
I like this little oontz box very much I thought the sound was very impressive for this little box, I use it everyday and I can charge it with my iPhone charger. I do recommend this to all of the people who want a portable speaker, also fair price.
Very good quality for a $40 speaker, the blue tooth syncs up nice and easy and it uses a micro USB connection to charge it so I just use my phone charger, no having extra cords to get tangled. The red grille is a lot darker than the picture makes it look.
In fact, you can use the same charger since it also uses a micro USB connection.I would recommend this to anyone wanting to spend a lot less on an 'equal' quality mini-speaker, plus the angle shape is a nice alternative to the box, as it takes up a bit less room.
This thing is awesome. Easy to use and works great. Price is right too. I want another one so I can have music everywhere.
Not as good as a jambox, but not bad either. I use this one in the kitchen where it can be a little noisy and it is definitely loud enough. I wouldn't recommend for an audiophile but it's great for casual use.
Good sound and charge life for price! Decide if you want to spend $200+ for Bose if not this one is awesome. I use on golf cart and it's better than all others in this price range!
It came promptly and was very reasonably priced and has a satisfying sound, I use it on a bike I built. It has a black grille, unlike the red one pictured. The red would've matched better, and I give it 5 stars otherwise.
Was pleased when I first received the speaker,it's a nice size and has decent sound for the size.But after One month of very light use(perhaps 3-4 hours total)it will not longer charge nor hold a charge,disappointed and really a shame because I liked the little guy.
Answer: I plug it into my computer or usb capable wall charger.  It charges in no time.