With treble, middle, and bass adjustments capabilities, combined with central point positioning, you can easily find the perfect balance. Additionally, you can effortlessly defeat all the tone adjustments with just a click on the PURE button. Unmatched Headphone Compatibility: Experience versatile connectivity with the Fosi Audio SK01 Headphone Amplifier Preamplifier 2 in 1. Its input features a 3.5mm line in, while the output offers a 3.5mm line out, along with a 3.5mm/6.35mm headphone jack. Enjoy powerful performance with a max power output of RMS 2400mW@32Ω, catering to terminating impedance between 16-300Ω. Elevate your audio experience with seamless connectivity and exceptional power, all in one compact device. Tailor-Made Audio Experience: The SK01 is a multi-functional audio gear that caters to desktop and portable music playing and tone tuning. The tri-band adjustment allows you to personalize treble, middle, and bass, finding the perfect balance for your preferences. Multi-functional experience: Whether as a powerful headphone amp, a customizable analog preamp, or an accurate equalizer, it effortlessly elevates your listening experience, delivering exceptional sound quality and personalized sound signatures. Long-Lasting Battery: Enjoy up to 6 hours of continuous usage with the built-in high-capacity battery, while the isolated power design rejects interference, providing a pure listening experience without any interruptions. Exquisite Design: Crafted with an aluminum alloy body, the SK01 is both elegant in appearance and touch, adding a touch of sophistication to your desktop setup. What you Get: Fosi Audio Sk01 Headphone Amp x1, User Manual x1,2-in-1 USB Type-A/C to Type-C Cable x1, an 24-month worry-free warranty and friendly customer service.