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

Input:
Question: Does this only run on battery or will it also run with an ac adapter?
Document: Very good, I daughter liked it. Very good sound, and sensible in the touch control panel. Also it is a very good iphone battery charger.
The iHog has suprisingly good sound, but the second time we used it for a prolonged period (i.e. about 2 hours on battery power) all of a sudden there was no sound at all! I had to take out my iPod from the docking station, turn off the iHog, I waited a few minutes then tried again and it would work for about 15 minutes then no sound again. This routine happened 5 times in one evening until I just gave up. Thank goodness for Amazon's customer service.
now i have to send it back again and get a refund because they cant replace it again. My daughter is making a big deal, she wants another pig and I refuse to send it back again. I do want to say that when the item was working it was a great item the best sound and sooo cute but at over a hundred buck.... Im a need it to do more than that! !
bought this for my daughter for Xmas. she is not hard on toys, treats them well. She has an iphone 3 or 4, and the dock would never hold it properly. Because of this the sound would incur static. I installed a rubber bumper in the dock area, to keep the iphone upright, so the sound would be clear. although ridiculous,This worked for many months, and I lived with it.
What can I say. I bought one for myself and then ended up buying 2 more as gifts for xmas because others drooled over this unit with its remote control and rechargeble batteries and  sound which is incredible.I use the 3.5 mm jack cable included for my mp3 player.Dont think twice ...just get it!
This really is exceptional, it is able to go MUCH louder than its cousin the iPig, it makes oink-oink sounds with its 4 speakers & a 20-watt subwoofer, it has adjustable bass and trebleto boot!Besides the remote you can change the volume by touching its ears & the playback on the head!It is portable (lasts about 10 hours on the rechargeable batteries)and just too cute!
This product did not have the best sound, considering that it is an expensive little item. It has already stopped playing my daughter's Ipod Touch, and the connection is obviously bad when you place the Ipod on it. I can't even return it because it is past the return window....She has had it less than 2 months. I would never recommend this product, and if you do want to purchase it--- by it from a place that offers a better warranty on it.
This is the 3rd time I have purchased one of these docking stations. This unit has the best sound for an inexpensive docking system. After I bought the first one for my daughter, my husband stole it one day and wouldn't give it back! When we bought him one so she could have it back he wanted the exact same one because of the sound quality. The next one I bought for another child. I am sure I will purchase a few more before we are done.
The iHog has a great sound and charges the phone as well! The design is great in my grandchild's room!
Static was back. Tonight, the ihog connector finally stopped transmitting sound. The Ihog is dead! Warranty is up and I'm out $100. SUCKS!
Answer: Yeah it also works on ac adapter...but this product is actuay cheaper on groupon for $39.99