Features:Support most high-impedance 16-300 headphones, 3.5mm AUX input and output, signal-to-noise ratio>100Db, THD+N=0.0003%, fully filter out noise, and enjoy high-quality audio[Two-stage gain switch]-This headphone amplifier enhances the signal input to the amplifier circuit to achieve the best performance of the headphone. It can not only output louder sound, but also output clearer and more realistic stereo without distortionRechargeable Lithium Battery--Adopt 600mAH rechargeable lithium battery, which can keep the headphone amplifier working for more than 8 hours. In addition, there is a volume control knob to adjust the volume[Portable and Lightweight]--This headphone amplifier is designed to let you enjoy music anytime, anywhere; the smooth, sturdy shell and chassis can achieve long-lasting use[Wide compatibility]-This amplifier is very compatible with various digital devices, such as MP3, MP4, iPhone, iPod, iPad, computers, CD players and personal media players, Xbox one, PS4, PS5 controllers, etc. .[Good sound quality]-restore the real sound quality with a wide dynamic range, reduce the distortion rate to create a wide and deep sound field, and the sound quality is delicate and accurate.