JANZU HiFi Headphone Amplifier Mini 16-300Ω Earphone Amp 3.5mm AUX Audio Receiver Music Player Earphone Amplifier Easy to Use

[Rechargeable Lithium Battery] - Using 1000mAH rechargeable lithium battery, the headphone amplifier can work for more than 8 hours. In addition, there is a volume control knob for adjusting the volume [Two-Stage Gain Switch]- This headphone amplifier enhances the signal input to the amplifier circuit for optimal performance from your headphones. Not only can it output louder sound, but it can also output clearer and more realistic stereo sound without distortion. [Mini HiFi Headphone Amplifier] - This headphone amplifier is designed to allow you to enjoy music anytime, anywhere, and the sturdy aluminum alloy shell allows for long-term use. [3.5mm AUX Input and Output]- Supports most high-impedance 16-300Ω headphones, 3.5mm AUX input and output, signal-to-noise ratio 100Db, +N=0.0003%, Possibility to Output not just Louder Sound, but a and More Real Stereo Sound without Distortion. [Wide Compatibility] - This amplifier is very compatible with various digital devices, such as MP3, MP4, computers, CD players and personal media players.