iFrogz Audio Coda Forte Bluetooth Headphones with Microphone - Black Includes 3.5mm jack and cable for charging - 12-hour battery life Works with all Bluetooth devices - Cord Length: 1.2 m Driver Unit: 40 mm neodymium - Impedance: 32 ohms Sensitivity: 102 dB +/- 3 dB at 1 kHz - Frequency Response: 20 Hz to 20 kHz Authentic iFrogz products and warrantees on iFrogz products