Audio Enhancement Infared Dual Channel Wireless Receiver unit, no AC adapter. This was in a lot of gear I acquired from someone who won a storage auction, but the promised cords, adapters, etc., for the acquired items did not not materialize. So far, however, everything from this lot has worked ... labeled as being for classroom use, there is no reason it couldn’t be used at home, in the garage, etc., or always good for parts. The top has one small dent, which is clearly pictured. Please feel free to contact me if you have any questions or want more pictures: likewise, if you want to combine this purchase with any of my other listings, please send me a message. Be well, stay safe, and thanks for looking.