Features: 100% brand new and high quality The headset is good helper for online classes. The headset is anti-electromagnetic interference ,not distracted for your learning. Wired stereo sound over ear headset supports the computer, notebook,tablet PC,phone,etc. The volume control on the earphone line can easily manage the volume. Your best partner takes you to shine in the class! Package Includes: 1 x Headset Specifications: Wire Length:About 2m/78.74in Headphone Jack:3.5mm/0.14in Headset Materal:Plastic+PU Color:Black,Blue,White(Optional) Length:17.5cm/6.89in Width:6.4cm/2.52in Height:21cm/8.27in Frequency Range:20-20000(HZ) Horn Diameter:30mm/1.18in Sensitivity:42dB Impedance:32 note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.