Mee audio Black HP-AF65-BK-MEE 3.5mm Connector Air-Fi Touch Advanced Bluetooth Wireless Headphones with Touch Control and Headset Functionality Type: On-Ear Driver Unit: 40mm Frequency Response: 20Hz–20KHz Input Impedance: 32 ohms Sensitivity: 105±3 dB (1mW at 1KHZ) Cord Length: 3.94 ft. Microphone Frequency Response: 100Hz-10KHz