MEE audio X7 Plus Stereo Bluetooth Wireless Sports In-Ear HD Headphones with Memory Wire and Headset Functionality Type: Sport Driver Unit: 6mm Frequency Response: 20Hz–20KHz Input Impedance: 16 ohms Sensitivity: 100±3 dB (1mW at 1KHZ) Cord Length: 12 inches (31 cm), detachable Weight: 0.5oz (14g) Wireless Type: Bluetooth