Dustproof, water resistant, rugged and tough - The gx-bt180 is ready to go wherever you do. A handy loop lets you attach it to anything you like (bikes, backpacks etc.) making it ultra-portable With the latest lithium-ion tech, The built-in rechargeable battery lasts for up to 10 hours and will keep pumping out the tunes for as long as you need it to Stereo-spatial sound from 2 x 7W RMS high-quality speakers; power does not compromise quality and sophisticated DSP ensures crystal clear sound reproduction so you hear every detail at any volume Bluetooth lets you wirelessly stream audio from your Phone, Tablet (or other Bluetooth device) and seamlessly integrates Siri, Google Assistant and call answering through the built-in microphone Stylish one-touch buttons easily control volume, playlists or answer calls without having to access your phone. Other features include USB charging and a 3.5mm aux line-in to connect to other devices