The Harman Kardon Esquire Mini Portable Wireless Speaker and Conferencing System in gold is a two-way audio system that supports Bluetooth technology for wireless pairing and streaming from Bluetooth-enabled devices. It also features a built-in conference phone system. The built-in Lithium-ion battery lets you play your music wirelessly for up to eight hours at a time and you can also charge devices via the speaker's USB port. The Esquire Mini features leather backing with an aluminum finish and ceramic-coated speaker grille.