Polaroid Bluetooth Wireless Slim Stereo Speaker, Reachable & Portable (Black) Wireless - Pair any Bluetooth-enabled device with the speaker and enjoy music, podcasts and more. Stereo sound - A built-in amplifier delivers powerful stereo sound with deep bass and clear highs. Thin profile - Slim, lightweight design is stylish, saves space, and allows for easy portability. Rechargeable - Lithium-ion battery provides hours of use. Aux-in function -3.5MM Auxiliary cable included for wired connection.