Model Number: TP-EH-S480D2 Key Specifications/Special Features: Descriptions:1.Stereo sounds, clearly, high performance2.Special speaker materials, very comfortable3.Colorful, most fashionable and comfortable even for long listening4.Earplug design, easy get on and get off5.Use 3.5mm connector6.Can be used for PC, MP3, MP4 and other portable multimedia7.Noise reduction, the unique design of the Studio headphones has a powerful noise reduction, that you can enjoy calling and music no matter where you are, even in a noisy crowd Frequency response range20-20,000Hz Speaker size 40mm Speaker impedance 32Ω Speaker sensitivity range 105 ±3dB at 1kHz Rated power 25mW Maximum power 40mW Stereo plug size 3.5mm R&L balance ≤3dB (50Hz-5kHz)