Technical Specs:- >Impedance: 24 Ohms. >Sensitivity: 108dB/mW. >Frequency Response Range: 3Hz-40kHz. >Gold-Plated 3.5mm Termination Plug. >Rated Power: 50mW. >Cable Length: 1.8Mtr. iBasso has released its latest semi-open back headphone, the iBasso SR2. It is an enthusiast-grade high fidelity semi-open back headphone that provides HiFi sound quality. unboxing Latest Technology, High-Quality Sound:- The iBasso SR2 is equipped with latest technologies like high-flexibility silicone suspension, Tesla Magnetic flux circuitry, and carbon-fiber diaphragm material. The pair is capable of providing high-resolution sound output rich with crisp details. The elasticity of silicone combined with Tesla’s powerful flux circuit produces a very powerful, detailed sound output. Carbon Fiber Circular Diaphragm:- The iBasso SR2 features a high-rigidity carbon fiber circular diaphragm unit. It brings life to your music and produces it with butter smoothness. All the frequencies are produced smoothly with no harshness or fatiguing even at louder volumes. Tesla Magnetic Flux:- The iBasso SR2 uses a powerful Tesla magnetic circuit, which provides great flux to drive the diaphragm easily. This makes the pair more sensitive and produces great level of micro detailing in your music. Users will be able to enjoy all kinds of music with high level of details in their instruments, making the music more fun and enjoyable. Liquid Silicone Suspension Drivers:- The flexible liquid silicone suspension provides an excellent dynamic and transient response. Compared to the traditional polyester suspensions, the liquid silicone provides a fuller, powerful lower end with precise positioning and deep impactful thumps.