specifications: Model: H-11 Driver diameter: 40mm Impedance: 16Ohm ± 15 % Sensitivity: 115 + 3DB Frequency range: 20Hz-20KHz Mic dimension: 4.0 * 1.5mm Microphone sensitivity: -42dB +/- 3dB Microphone impedance: 2.2 kOhm Directionality: All directional Cable length: approx. 2.1m ± 0.15 LED operating voltage: DC5V +/- 5% Working current: below 50 mA. Headset interface: 3.5mm (4-pin) + USB (USB only for LED light). List of packages: 1 * gaming headset 1 * 3.5mm headphone splitter adapter 1 * User manual