Big sound. Compatible with Bluetooth. Portable speaker. Enjoy wireless listening and calls with this high quality pocket-sized speaker! Bluetooth 3.0 technology. Wireless Range: 30 ft. Frequency Response: 50Hz - 20kHz. Speaker Resistance: 4 ohms. Speaker Sensitivity: Greater than or equal to 85 dB. Mic Sensitivity: -43 dB +/- 2 dB. Mini USB to USB charging cable. 3.5 mm auxiliary cable. FCC listed. CE listed. 3-4 hour play time. Features: portable wireless speaker; 3-4 hours play and talk time; 3.5 mm aux cable included. Limited lifetime warranty inside. Designed in Colorado, USA. Made responsibly in China.