🎶 Elevate Your Audio Game! Rechargeable lithium battery with 2000mAh capacity for 12-15 hours of uninterrupted music. Lightweight design ensures portability without compromising on robustness. Experience audio like never before with a signal-to-noise ratio exceeding 100dB. Seamlessly connects with MP3, iPhone, Xbox, and more for versatile audio enjoyment. Two-stage gain switch for optimal performance, delivering sharper, distortion-free sound. 16-300Ω Impedance HiFi Sound 2000mAh Battery The Portable HiFi Headphone Amplifier is designed for audiophiles seeking high-quality sound on the go. With support for headphones ranging from 16-300Ω, a powerful rechargeable battery, and broad compatibility with various digital devices, this amplifier ensures an exceptional listening experience wherever you are.