Experience audio like never before with our premium headphone amplifier! 1. **Versatile Headphone Support:** Compatible with most high-impedance headphones (16-300Ω), featuring a 3.5mm AUX input/output. Signal-to-noise ratio >100dB, THD+N=0.0003% ensures crystal-clear audio by completely eliminating noise. 2. **2-Stage Gain Switch:** Enhances the input signal to the amplifier circuit, optimizing headphone performance. Enjoy louder, clearer, and more realistic stereo sound without distortion. 3. **Rechargeable Lithium Battery:** Equipped with a 600mAh rechargeable lithium battery, providing over 8 hours of continuous playback. Includes a convenient volume control knob for precise adjustments. 4. **Portable and Lightweight:** Designed for on-the-go listening, this compact and portable amplifier boasts a robust shell and chassis for long-lasting durability. 5. **Broad Compatibility:** Works seamlessly with various digital devices, including MP3 players, MP4 players, tablets, music players, smartphones, computers, CD players, media players, Xbox One, PS4, and PS5 controllers. 6. **Superior Sound Quality:** Restores true audio fidelity with a wide dynamic range, reduces distortion, and creates an expansive and immersive soundstage. Experience delicate and precise sound reproduction. Product Type: Headphone Amplifier Material: Aluminum Alloy Color: Black Battery Model: Lithium Battery (Built-in) Battery Capacity: 600mAh Input/Output Port: 3.5mm Port Load Impedance: 16-300Ω THD+N: 0.0003% Signal-to-Noise Ratio: ≥100dB Package Includes: 1 x Headphone Amplifier 1 x 3.5mm Cable 1 x USB Power Cable