The elegant Bluetooth 4.2 speaker features dual 5 Watt drivers to deliver powerful stereo sound and enhanced rich bass. And you can pair two units with one phone for true wireless stereo. The speaker provides more options with an AUX jack and a Micro-SD card slot. You can just enjoy the music whether in the shower or during outdoor adventures like climbing or camping for its IP45 dust-proof, water-resistant and shockproof design. The built-in microphone enables you to answer calls hands-freely. It's awesome when you need to bring families, friends or colleagues into the conversation.