Features 1、High Gain Mode: Our Portable Sound Decoder Amplifier features a high gain mode that allows you to effortlessly drive professional HiFi devices, ensuring a balanced output power of up to 220mW for an incredible and powerful sound experience. 2、No Noise Control Technology: This Lossless Decoding Amplifier employs advanced digital noise control technology, achieving near-zero background noise levels. Enjoy high-fidelity sound reproduction while effortlessly managing the noise floor for pristine sound quality. 3、Optimized Performance and Efficiency: Designed with scientific performance optimization, this Portable HiFi Sound Decoder minimizes power consumption and heat generation, reducing the load on your mobile device for longer battery life and lower energy loss during use. 4、Exceptional Sound Quality: With support for PCM 44.1kHz/192kHz digital encoding, our Headphone Amplifier provides lossless high-resolution playback, delivering outstanding sound quality and an immersive listening experience that brings original recordings to life. 5、Versatile Connectivity: Easily connect to your smartphone, computer, tablet, or music player with both 4.4mm and 3.5mm interfaces. The balanced and single-ended outputs open the door to an immersive sound experience across multiple devices. Specifications: Material: Aluminum Alloy Color: Black Sampling Rate Support: PCM 44.1K--384K Volume Button: 100-level independent volume adjustment SNR (32 ohm load): 3.5mm 125dB; 4.4mm 130dB THD+N Distortion (32 ohm load): 3.5mm 0.0004%; 4.4mm 0.0005% Output Power (32 ohm load): 3.5mm 90mW; 4.4mm 220mW Product Size: 5.3 * 2.6 * 1.3 cm / 2.1 * 1.1 * 0.5 inch Package List 1 * Amplifier 1 * USB Cable 1 * Instruction Manual