HamiltonBuhl HA2 Lab Pack - Green - 24 Pack compat_chromebook In-Line Volume and Mute Controls:

In-Line Volume and Mute Controls: Take full control over your audio with easy-to-reach in-line controls

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and any unit with a 3

The exclusive noise-canceling microphone with internal windscreens

HamiltonBuhl HA2 Lab Pack - Green - 24 Pack compat_chromebook In-Line Volume and Mute Controls:Affordable, classroomready listening kit featuring HamiltonBuhl HA2 personal headphones. Durable, easyclean design ideal for labs, centers, and testing. Choose Your Color Green Orange Also Available Galaxy SackOPhones SackOPhones 10Pack Whats Included (24) HA2 Green Personal Headphones (1) Heavyduty Polyester Carry Case Headphone Specs (HA2) Driver: 30 mm Frequency Response: 50 Hz 16 kHz Impedance: 32 Sensitivity: 90 dB 4 dB Plug: 3. 5 mm stereo, thin