Delphi SA10109 Delphi XM Roady2 Personal Audio System Turn your Roady2 XM satellite radio receiver into a portable XM listening device Built-in wireless FM transmitter turns any FM receiver into an XM radio Rechargeable battery provides up to four hours of use Delivers more than 150 high-quality, XM satellite radio stations Measures 5 x 3 x 1.4 inches (W x H x D)