Smarten up the way you hear your music with the GGMM E5 Superior Sound Speaker. This device is loaded with intelligent technology to make your life easier. With Bluetooth 4.0 technology, the speaker instantly pairs with the last device it connected to. In addition, because everyone has their own music taste, the E5 lets you totally customize your sound. On the front are treble and bass adjustment knobs for quality control. The E5 Speaker also offers hands-free calling with the built-in microphone. Compatible with any Bluetooth enabled devices, the E5 Speaker comes in sleek black or bright white. And, the ultra slim design means it ties in with any interior. With a battery life of 15 hours, the speaker can party as long as you do.