Wireless Bluetooth Speaker with Built in Mic 8 Hour Rechargeable Battery for Iphone 6, 5, 5S the Best Rechargeable Battery for up to 10 hours of playtime. Built-in microphone for hands-free speaker phone calling Easy to pair The Best Two powerful Drivers of 6W deliver crisp clean sound with deep bass Premium Sound with Bass Enhance Technology. Two powerful Drivers of 6W deliver crisp clean sound with deep bass The Best New Bluetooth v3.0 Technology allows you to Connect wirelessly up to 33 feet away Easily to carry with, only 8.3 ounces