The telephone headset has elastic head beam and breathable cushions, bringing you comfortable wearing feeling. Featuring noise-cancelling microphone, the telephone headset can bring you clear and lossless calling experience. Made of ABS and PVC material, the telephone headset is durable and eco-friendly to use. The cable is very long, which is more convenient to use. The length of the telephone headset is 16.5cm, width is 13cm and height is 6cm. The cable length of the USB and dual 3.5mm interface is 1.8m. The cable length of the single 3.5mm interface is 1.5m. The telephone headset is suitable for being used in telemarketing, truck driver office, customer service and so on. Item Name: Telephone Headset Material: PVC,ABS Model: SY440 Interface Type: 3.5mm Plug, Dual 3.5mm Plug, USB Speaker Diameter: Ф40mm Speaker Impedance: 32Ω Speaker Frequency Response: 20Hz-20KHz Speaker Sensitivity: 105dB Distortion Rate: 0.1 percent Features: Noise Cancelling, Comfortable, Ergonomic Size Details: Headset: 16.5cm x 13cm x 6cm or 6.5" x 5.12" x 2.36" (Approx.) Cable Length: 180cm or 70.87" (Approx.) Cable Length: 150cm or 59.06" (Approx.) Notes: Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. Package Includes: 1 x Telephone Headset Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.