HiFi Headphone Amplifier, Portable 3.5mm Audio Earphone Amp Supports Impedance 16-300? with Lithium Battery and Components for MP3/MP4 /Phones/Digital Players/Computers by MYPIN

?HiFi Headphone Amplifier ?-- It supports most headphones of high impedance 16-300?, 3.5mm AUX Input and Output, signal-to-noise ratio> 100Db, THD + N = 0.0003%, fully filter noise, enjoy high-quality audio ?Two-stage Gain Switch?-- It enhances the signal input into the amp circuit for the optimal performance of the headphones. Make it Possibility to output not only louder sound but a sharper and more Real stereo sound without distortion ?Rechargable Lithium Battery?-- It adopts a rechargeable lithium battery with 2000mAH capacity, which allows it to stay working more than 12-15h. Plus, there is a volume control knob for volume adjustment ?Portable and Lightweight ?-- This headphone amplifier is designed to enhance your music listening experience wherever life takes you; A sleek, sturdy shell and chassis allow for a durable use ?Broad Compatibility?-- This amplifier is remarkably compatible with a variety of digital devices, such as MP3, MP4, Mobile Phone, Computer, CD players and personal media players?It doesn't work for iPhone7 / 7Plus / 8 / 8Plus / X / XS / XS MAX / XR / 11/11 Pro / 11 Pro Max as they don't have a 3.5mm audio output(Tips: It is not recommended to use while charging, because current disturbance occurred when charging may lead to noise)