If you have a Bluetooth-compatible phone, you can pair them both to play your music files wirelessly, or stream from your favorite apps. When paired with a smartphone, you can use the built-in mic to transform the BT-155E into a speakerphone for hands-free calling.

Built-In Controls-On the top of the BT-155E are tactile, rubberized buttons that let you manually control the speaker. You can use them to switch to hands-free calling, play and pause music, pair it with a Bluetooth-compatible device, power it on and off, and adjust the volume.

Specification:
-Version: 4.2 
-Capacity: 1200mah 
-Rated Power: 3W 
-Material:ABS Metal
-Transmission Distance: 10M 
-Play times: 4-5 hours 
-Function: BT/Subwoofer/TF/AUX-IN/FM Radio
-Dimensions: 8 x 5.5 x 5.5cm approx

What's in the box:
-1x Speaker
-1x USB Cable