Made For Amazon, Battery Base for Echo (4th generation). Not compatible with previous generations of Echo or Echo Dot (1st Gen, 2nd Gen, or 3rd Gen).

Make your Echo portable with a Battery Base.
Designed to work with Echo (4th Gen). Echo sold separately.
Enjoy your music away from the power outlet with integrated battery lasting up to 5 hours.
Seamlessly attaches to the to the base of Echo (4th Gen) without tools.
Not compatible with previous generations of Echo (1st Gen, 2nd Gen, or 3rd Gen).
Not compatible with any generations of Amazon Echo Dot.
Included in the box: Battery Base and Quick Start Guide