Features: Adopt noise-reduction microphone, 120degrees adjustable angle, provides clear sound. 50mm stereo sound unit provides vivid sound field, clear and shock sound quality.  The headset is equipped with a volume controller wheel, one-key mute, more convenient to use. Equipped with 3.5mm jack and USB port, the USB plug can power the LED indicator light, plug and play. Ergonomic design, adopt soft memory-protein earmuffs, memory-sponge head pad and adjustable headband to ensure comfortable wearing. Specification: Brand: KOTION EACH Model: G2000 Color: Black+Blue Driver diameter: 50mm Impedance: 16 Ohm Sensitivity: 108dB+/-3dB Frequency range: 20Hz-20KHz Microphone size: 6.0*5.0mm Microphone sensitivity: -38dB+/-3dB Microphone impedance: 2.2K Ohm Directivity: Omnidirectional LED working voltage: DC5V+/-5percent Operating current: less than 100mA Headset interface: 3.5mm+USB(USB for LED lights) Cable length: Approx. 2.2m/7.22ft  Item size:20*17.5*7.5 cm / 7.87*6.89*2.95 in(L * W * H) Package size:21*19.5*10.5 cm / 8.27*7.68*4.13 in(L * W * H) Package weight:513g /18.1oz Packing list: 1 * G2000 Headset 1 * User Manual