Thank you for allowing me to assist you, my name is Joe and I will be happy to assist you with your concern today.
Yes there are devices to utilize bluetooth to two devices at the same time here is one such example: http://www.amazon.com/gp/product/B00NMPKVQ8/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00NMPKVQ8&linkCode=as2&tag=fixearbuds-20&linkId=2EAALP4BCZMJ6JMV
As you can see that device is specifically made to do what you are asking.
There are also headphones made that you can use as kits that have 2 headphones with a single 3.5mm jack or the red/white rca connections such as here:
Very cheap option and ok quality: http://www.amazon.com/dp/B001584QQU/ref=psdc_172541_t1_B0007GBALA these will require the ac adaptor as well and "y" splitter for single rca to dual rca: http://www.showmecables.com/product/RCA-Y-Splitter-RCA-Plug-to-Dual-RCA-Plug.aspx?utm_source=google&utm_medium=cse&utm_campaign=934&zmam=49733141&zmac=5&zmas=1&zmap=934&gclid=CMHVqNmR0ccCFQ2QHwodB7EFYg
And then the much better quality ones and much more costly are these for example: http://www.smithgear.com/hc-rs165-hdr165-bun.html?utm_source=googlepepla&utm_medium=adwords&id=111173365940&gclid=COS-t5mR0ccCFcERHwodDPQAcA
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