Koss TM602 headphones are ideal for the educational market. Comfortable, hear though design. Has a 3.5 mm plug. Featuring comfortable foam ear cushions and an adjustable headband, this headset is designed to be work for long periods of time. The TM602 includes a 1/8-inch and 1/4-inch stereo plug, making this versatile headset ideal for either home or portable use.