Rosewill Rosewill R-Studio AMPBOX Bluetooth Portable Speaker with Built-In Mic and Rechargeable Battery - Speakers - Retail Packaging - Black A2DP Bluetooth with 30 foot range for wireless music streaming Built-in microphone for phone calls Rechargeable Lithium Polymer battery offers up to 8 hours of playtime Works with any audio device that has Bluetooth or 3.5mm audio plug A2DP Bluetooth with 30 foot range for wireless music streaming ^Built-in microphone for phone calls ^Rechargeable Lithium Polymer battery offers up to 8 hours of playtime ^Works with any audio device that has Bluetooth or 3.5mm audio plug