Ujjdwiurgh Upgrade Bluetooth HiFi Headphone Amplifier Headphone Amplifier 3.5mm Stereo Audio Out 16-300ohm with Switch Powered

[Portable and ] - This headphone amplifier is designed to let you enjoy music anytime, anywhere; the sleek and sturdy shell and chassis can achieve long-lasting use [Rechargeable lithium battery] - Adopts 1000mAH rechargeable lithium battery, which can make the headphone amplifier work for more than 8 hours. In addition, there is a volume control knob to adjust the volume. This is an upgraded version of the old version with Bluetooth function. Supports most high-impedance 16-300ohm headphones, 3.5mm AUX input and output, signal-to-noise ratio 100Db, +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 headphones. It can not only output louder sound, but also output clearer and more realistic stereo without distortion. [Wide compatibility] - The amplifier is very compatible with a variety of digital devices, such as for MP3, MP4, for , for , for , computer, CD player and personal media player, for , for , for , etc.