Feature: 1. [Aluminum Alloy Material] Made of aluminum alloy material, which is wear resistant, exquisite workmanship, delicate touch, and can be used for a long time. 2. [Bluetooth Connection] This speaker adopt Bluetooth sound decoding chip, support all Bluetooth device connection, and the receiving distance can be as long as 10 meters. 3. [High Definition Stereo] With soft tones, clear high definition stereo, rich subwoofer, which is clear and dynamic, with distinct levels, to meet your various need. 4. [Multifunctional] Support U disk, Micro storage card, Micro memory card play, automatic decoding of mainstream sound formats, plug and play, maximum support 32G memory card. 5. [Hands Free Call] Support hands free Bluetooth calls, built in noise reduction sensitive microphone, can effectively reduce external noise during calls. Specification: Item Type: Speaker Material: Aluminium alloy Battery: A polymer lithium battery with a capacity of 800MAH (Battery Included) Voltage: 5V Product Height: Approx. 5cm / 2in Maximum Diameter: Approx. 7cm / 2.8in Weight: Approx. 118g / 4.2ozColor: Silver grey . Package List: 1 x Speaker (Battery Included)1 x USB Cable