Lenmar Thunder 900mAh Rechargeable Portable Bluetooth v2.1 Speaker for iphone 4 4s 5 5s 6- Samsung galaxy s3 s4 s5 - Samsung note . Better Sound, Better Volume,Incredible Online Price and Enhanced Bass+ Resonator - Black The Thunder has four internal speakers and a bass amplifier for all of your music Connects to any Bluetooth v2.1 enabled device for wire-free use. Built-in lithium-polymer rechargeable battery allows for ultimate portability Unit doubles as a mobile phone hands free microphone and speaker-phone LED Indicator provides charging status, full charge, and Bluetooth ready signal. Ultra-portable and compact design for home and office, designed to amplify the bass Speaker comes with audio cable  can be plugged into any music playing device