Sunbeam 72-SB650 Stereo Big Bass Headphones with Microphone - Black Stereo Headphones with Extra Bass, Stereo Sound Output Adjustable Headband, Built-In Mic for Hands-Free Calls Connects through 3.5mm Jack, 59" Cable Length Speaker Diameter: 40mm, Frequency Response: 20Hz-20KHz Impedance: 32 Ohms Connectivity technology : Wired