Specifications: The combination of moving coil and moving iron creates a heavy bass and stereo music quality. Ergonomically designed to fit your ears perfectly and won't fall off easily. Universal 3.5 more→mm plug suitable for most phones, tablets, MP3, MP4, etc. Product Detailas: 1.Product Name:QK4 Dual Drive Game Headset 2.Material: Plastic + TPE 3.Impedance: 20Ω 4.Sensitivity: 99dB/m-W 5.Frequency Range: 20-20000Hz 6.Plug Type: 3.5mm Plug 7.Driver Unit: 2BA + 1DD Mixed Driver Unit (Composite Dynamic + Composite BA) 8.Features: In-Ear, Heavy Bass, Wired, Universal, Stereo Sound, with Mic 9.Cable Length: 1.2m/47.24' (Approx.) Package Includes: 1 Pair of Wired Earphones