NAMEO Wireless Bluetooth Speaker, Bluetooth 4.0 Aluminum-Alloy USB Rechargeable Built-in 4000mAh Battery Power Bank for iPhone, iPad Samsung Android Phones and Other Music Players (Black) Premium Material: Design by aluminium alloy materials polished with cool look & fashionable. High Quality Crystal Clear Sound: With 2 precision 10W acoustic speakers delivering you enjoy an impressively crystal clear & super basa sound. Power Bank Function: Built-in 4000mAh rechargeable battery for up to about 15-20 hours of playtime. Take it for outdoor Party with built-in rechargeable battery.What's more,it can also used as power bank to charger your cell phones. Built-in Mic: For handsfree speakerphone for use with smartphones and iPhones; connect in seconds to Bluetooth devices including: iPhone, iPad, iPod, Samsung, Kindle, Smartphones, Tablets; play audio from laptops, PCs, and non-Bluetooth devices using included 3.5mm audio cable/AUX-IN jack; includes Micro-USB cable for charging. Elegant Portable Design: This portable bluetooth speakers have versatile portable design with aluminum out case and sturdy body, so you can place it in a variety of locations and can easily take it from one place to the next.