Califone 3065AVT Lightweight Personal Multimedia Stereo Headset with To Go Plug, Black, Fully adjustable headband fits all students, Recessed wiring resists prying fingers, Comfortable lightweight ear cushionsThis stereo headset is so light and comfy students might forget they even have it on. Ideal for podcasting, mobile and distance learning, it can also be used for language learning applications, computer labs, gaming and with presentation software. The 3065AVT is compatible with iOS, Windows and Android-based smartphones and tablets for mobile learning applications as well as assessments. When used for only listening, the flexible boom mic can be folded up alongside the headband out of the wayKey FeaturesFully adjustable headband fits all studentsRecessed wiring resists prying fingersComfortable lightweight ear cushionsPermanently attached straight cord with reinforced connection resists accidental pull out for classroom safety3.5mm To Go plug connects with tablets, smartphonesUnidirectional electret mic on flexible gooseneck microphoneWindows and Mac compatibleLightweight design for comfortSpecificationsHeadphones:Diaphragm: 27mm MylarMagnet: FerriteImpedance: 32 Ohms more or less 15 OhmsFrequency Response: 20-20000 HzSensitivity: 105dB SPL more or less 3dB at 1kHzMax Input: 40 milliwattsDistortion: 5 PercentCord: 3 feet with reinforced connectionMicrophone:Type: Electret condensorDirectivity: UnidirectionalSensitivity: 47dB More or less 3dB at 1kHzFrequency Response: 10-10000 HzOperating Voltage: Nominal 2V; accepts 1.5V-10VWeight: 10 ounces, shipping weight 1 pound