Studio Dome One (SD1) Bluetooth Portable Speaker with Hands-Free Feature and MicroSD Card Slot Studio-quality sound: Designed for excellent Bluetooth playback and great as a hands-free speaker phone too. With a range of up to 20 feet, enjoy crystal clear sound while talking on the phone, jamming at the beach or enjoying a movie with family and friends. Simple, Stylish, Durable, Portable: Enjoy your music on the go with this small, attractive, and easy to operate device. Studio Dome is for use in-home, outdoors, traveling and even in the car! Connect more than one: The powerful sound of Studio Dome can be amplified further by daisy-chaining multiple units together for greater volume and broader sound field. Multiple media connections: AUX Cable, Micro USB, Micro SD slot for crystal clear playback of your MP3 and WMA files.