Hammacher Outdoor/Indoor Wireless Speakers. This set of wireless outdoor/indoor battery-powered speakers with a UV- and water-resistant exterior were developed for Hammacher Schlemmer.  This unique system allows users to listen to music at any location without the hassle of speaker cables or outlets.  These Wireless Speakers can be easily carried with its built-in handle.  These speakers were engineered to produce high-quality sound while maintaining its wireless technology to work up to 150 feet from the audio source.