Instruction: Answer the given question using the supporting document.

Input:
Question: Can you also plug this into an outlet or is it battery only
Document: I absolutely love this little  baby! It has awesome sound for such a small unit. And I love the storage capacity. SD Cards as well as thumb drive can hold an incredible amount of music. I use this every day at work and just took it on a camping trip. I love it so much I bought 5 extra batteries for it! I also plug my cellphone into it and listen to podcasts every day. I heard Art Bell promoting it on his radio show and took a chance.
Other than a muddy base sound, the unit functioned well. Bluetooth pairing, FM radio, and other settings work rather well. Battery time is excellent.
Great item and easily links to multiple blue tooth devices. Great size and long battery life. A little shy in the bass, but overall a nicely executed device.
The speaker works great with my TV. A slight lag in sound transmission but this is the nature of blue tooth - no fault of the product. I also use it with my phone when washing the car. The sound is very powerful for outside use. I am completely satisfied with the product.
Pros:Lots of input options, SD card, USB, Aux In, Bluetooth, and radio.Battery does last for a good amount of timeCons:User interface needs a lot of work, you cannot program the radio stations with the autoscan feature and it does not allow to just skip from station to station if you go manually.
In fact thinking about it, if you needed extra hours play why not buy an extra battery and charge them both up. I got over 8 hours play on medium volume using my Kindle Fire HD.We have quite a large living room/kitchen and I could use this for parties and it would easily be loud enough.
My wife bought me this for my birthday, as I enjoy technology.This little unit is really well made and the quality of sound is amazing for the size.I use it on my Kindle Fire mainly, have also used it with a USB memory stick when working in the garage or garden.I have used it with my ISP provider TV APP and as expected with Bluetooth the sync is out slightly.
I have had a few speakers in my time but this one is the best. What I like the most is the fact that this device is also a radio that I can listen to in an emergency. It is light weight though, so it is not as tough and durable as an out door speaker. I put a dent in the grill within a month of purchase after it fell from a small height. I'm glad it wasn't worse proving this device is not for little kids.
Never got an opportunity to use the radio.It never worked with the battery. Should have been an easy fix, just send another one. Didn't happen. After months of waiting and repeated phone calls waiting for a shipping label, I finally gave up and returned the radio to Amazon for a full refund.Thank you Amazon.Won't ever buy another product from the C. Crane Corporation.
Sound is good, not great. Purchased the unit because it had FM and bluetooth. FM reception isn't great but the bluetooth works well so I have been been using the speaker with my iPhone and iheartradio app. Since I don't get great FM reception in my office with it, I think I could have gotten a higher end portable bluetooth speaker for the price. The buttons and the menu navigation is also a little clumsy to use.
Answer: As long as you have a USB wall charger, you can plug it into an outlet using the USB wall charger or you can charge it with your computer's USB port. Keep in mind, listening while charging will cause the battery to take longer to charge.