The Ematic Sound Power Bluetooth Speaker & Speakerphone Enjoy your favorite music wherever you go with the Ematic Sound Power Bluetooth Speaker and Speakerphone. Easily pair with your NFC copmatible device. The built-in microphone lets you take calls loud and clear. The compact design makes this speaker perfect for the on-the-go user. 30+ feet range depending on environment. Answer calls and functions as a speakerphone. NFC Pairing. 3.5mm Line-in. Frequency Response: 20Hz. 20Khz. Built-in Rechargeable Battery. Battery Life: 12 Hours. In the Box: Speaker, AUX Cable, USB Cable, Manual.