The Hamilton MS2G-AMV Headphone with Goose Neck Microphone and Volume Control is the perfect companion to any of your Apple(TM) devices, tablets, Chromebooks or almost any mobile device. MS2G-AMV features foam ear cushions, an easy-to-wear lightweight design and a 4 foot long cord. All these features contribute to fatigue-free use in and out of the classroom. Comes in easy to mark light blue colors. Ideal headphone for testing! *Product Specifications:** **Headphone:** - In-Line Volume Control - 30mm Neodymium - Frequency Response: 20-20,000 Hz - Impedance: 32 Ohms - Sensitivity: 105DB+/-4DB - Max. Input: 100MV - Plugs: 3.5mm TRRS - Cord: 4 Feet - Chew-Resistant, Braided Nylon Cord - Headband: Adjustable - Replaceable Leatherette Ear Cushions - Mac/PC Compatible *Microphone:** - 6*2.5 Type - Sensitivity: -58DB+/-3DB - Frequency Response: 20-20,000 Hz - Impedance: 2,200 Ohms - Operating Voltage Nominal 3V - In-Line Mute Button - 3.5mm TRRS - Mono - Warranty 1 Year *Prevent The Spread of Lice:** Built with kid's health and safety in mind, these headphones are designed to combat the spread of head lice in schools. Each headphone comes in its own heavy-duty, write-on, moisture resistant, reclosable bag. When sealed in the bag, lice is killed in 24-48 hours without the use of chemicals.