The Hamilton HA7M Headphone with Boom Microphone starts with our class-leading HA7 headphones and adds a built-in boom microphone. The HA7M features soft leatherette style washable, replaceable ear cushions an easy-to-wear lightweight design with swivel ear-cups and a 6 foot long cord. All these features contribute to fatigue-free use in and out of the classroom. Comes in easy to mark medium gray colors. Ideal headphone for testing!