Tenergy Music PowerBox Bluetooth Speaker & Built-in 5000mAh Power Bank (White) The Tenergy Music PowerBox Bluetooth Speaker is compatible with all wireless Bluetooth devices including the iPhone, iPod, BlackBerry, smartphones, tablets, notebooks and desktops. It is perfect for listening to your favorite music, watching movies, or playing video games. Simply connect the speaker to your Bluetooth device or to any other audio device with 3.5mm aux line-in cable connection and enjoy loud, clear, and high-fidelity sound wirelessly. This speaker also comes with a 5000mAh built-in power bank that charges your phone on the go!