Audiovox XMB-10 XM Boom Box for Xpress XM7 Satellite Radio Receiver Provides big stereo sound in a compact and lightweight body, so you can bring your XM7 receiver with you and share your satellite radio with friends and family wherever you go Features enhanced sound reproduction from its high-quality, 4-way speaker system, and an integrated XM satellite antenna that removes the hassle of attaching an external antenna Includes an auxiliary input connector to hook up an MP3 player or other peripheral, and headphone output jack so you can listen without disturbing those around you Runs via an included AC power adapter, or can be made portable with eight D-cell batteries, which can be recharged from your boom box if they are rechargeable batteries Weighs only 6.8 pounds, measures approximately 19 x 8.5 x 7.5 inches (W x H x D), and is backed by a manufacturer's limited 12-month warranty