No ac adapter. Sender only. The Rocketfish RF-WHTIB-A Receiver is a wireless rear speaker transmitter that operates on a frequency range of 2.4GHz. It features a black color design and is compatible with a universal range of speaker brands. With an input connection of speaker wire and a single output connection, this audio​/​video device allows for easy and convenient wireless setup for your home entertainment system. Perfect for transmitting audio signals to your rear speakers without the hassle of messy cables, the Rocketfish RF-WHTIB-A Receiver is a reliable and user-friendly choice for enhancing your audio experience.