Description: Limited by the cost, other products in the market choose regular material which cannot offer you real HIFI sound quality. But we determined to make it the best with high-quality material. A great tool for you to have, stable and practical, buy it! Features: Select high-end audio decoding chip, high-quality components. The headphone amplifier can directly match HiFi headphones, you can enjoy true HIFI music. Made of aluminum alloy, it is tough and durable. HiFi sound quality, give you a natural listening experience. Working stably, a very practical tool for your family. Compact, space-saving, with an elegant look. Has been tested for hundreds of time to ensure you a good sound quality. Specifications: Name: Music Amplifier Model: X3 PRO Chipset: STM32+ES9023+CS8416 Sampling Rate: PC--UCB~24Bit/96KHz, Fiber Optic/Coaxial~24Bit/192KHz RCA RMS level: 1.8Vrms Headphone Power Output: 45mW@16, 85mW@32,160mW@64, 150mW@120, 65mW@300 Headphone THD: 0.04% Headphone SNR: 105dB Headphone Frequency Response: +0 / -0.5dB(20Hz-20kHz) Input: Optical,PC-USB,Coaxial Output: RCA, 3.5mm Headphone DC power supply: 5V 1A Product Size:11*9.5*3.5cm/4.33*3.74*1.38in Package Size: 26*20*7cm/10.23*7.87*2.76in Package Weight: 517g/18.24oz Package List: 1 * Music Amplifier 1 * Power Adapter 1 * USB Cable 1 * User Manual