Includes: Cyber Acoustics AC-4000 Analog Headset and User Guide. Includes 1 year hassle free warranty. Our US based customer service team is here to help. Contact us through . Easy to Use: Simply plug in and play, no installation needed. Connect 3.5mm cable directly to your Mac, PC or any electronic device with a 3.5mm audio jack connection. Universal Fit & Durable Design: Adjustable headband with easy to clean leatherette ear pads. Headset and tangle free braided TuffCord cable designed for hard wearing and to be long lasting for student and personal use. One Size Fits All: With an adjustable headband and leatherette ear pads, this headset can be adjusted to fit most head sizes. Also features a flexible microphone boom arm to put the mic in just the right position to be heard clearly. Noise Canceling Microphone: Minimize unwanted noise with a unidirectional noise-canceling microphone. Microphone only picks up sound from a specific side or direction of the microphone, minimizing ambient noise while speaking or recording. Perfect for K12 classroom or home.