Bluedio Versatile Wireless Mini Speaker for Mobile Phones - Retail Packaging - Black 1.Powerful wireless mini speaker: With powerful 40mm speaker special crafted by Bluedio, and benefited from Bluetooth 3.0 high quality wireless transmission, BS-1 can create clear bass resonance for your ultimate music experience. 2.Multipurpose speaker: It also supports wireless talk, whether in your living room or having a conference call, your hands can be liberated from the wire. 3.Up to 4 hours continuous music and talk time, and 300 hours standby time, even stay connected with your PC or mobile phone, the battery will last for more than 12.5 days. 4. BS-1 can also be a Bluetooth receiver between mobile phone and amplifier. 5. Strongly compatibility: BS-1 can be compatible with iOS, Mac, Android, PC, Smart TV and so on. In addition to its black rubber paint finish, BS-1 is suitable for outdoor and personal use.