Portable Bluetooth Wireless Speaker/Speakerphone with Built-In Battery... Features Bluetooth v2.1 for superior wireless performance; Receive up to 33 feet away; Remembers up to eight paired devices; Play music wirelessly from your Smartphone, iPod Touch, iPhone, iPad, PC or Mac laptops; Connect an iPod or any MP3 Player with a 3.5mm auxiliary audio output; Works with any phone or device capable of transmitting the Bluetooth stereo (A2DP) protocol; Up to 6 hours playback using internal Lithium-ion battery.