Wide Compatibility: This headphone amplifier supports a wide range of high impedance 16–300Ω headphones. With 3.5mm AUX input and output, it ensures clear o quality and reduces noise, allowing you to enjoy enhanced sound performance. 2-Stage Gain Switch: This headphone amp enhances the signal from the input to the amplifier circuit, enabling optimal headphone performance. It delivers louder output with clearer, more detailed stereo sound and minimal distortion. Rechargeable Lithium Battery: Equipped with a 1500mAh rechargeable lithium battery, this headphone amplifier provides over 8 hours of continuous use. It includes a volume control knob for easy and precise volume adjustment. Portable and Lightweight: Designed for portability and convenience, this headphone amplifier lets you enjoy high-quality o anytime, anywhere. Its durable aluminum alloy casing offers reliable protection for long-term use. Wide Compatibility: This amplifier works with various digital devices such as MP3 players, MP4 players, smartphones, computers, CD players, and personal media players, making it suitable for multiple o setups.