HiFi Headphone Amplifier Portable and Adjustable 3 5mm Audio Earphone Amp Supports Impedance 16-150Ω Headset Amp

Features: 1. This HiFi headphone amplifier supports 16-150Ω impedance, is exquisite and portable, easy to carry, and can output excellent sound without distortion. 2. 3.5mm AUX input and output. 3. High-quality audio, suitable for your mobile phone MP3 MP4 laptop. 4. Noise reduction function, enhanced dynamic distortion, perfect pure stereo effect, high-definition voice and music sound quality optimization. 5. Aluminum matte surface, stylish and compact design. 6. Not only suitable for music lovers, but also an ideal gift for people with hearing problems. Troubleshooting: Q: Why is there a buzzing/hissing sound? A: Please don't use it while charging, because it will cause current interference when charging. This is why there is noise. After fully charged, disconnect the power and use the headphone amplifier. Q: This amplifier is not high enough for my bigger headphones. Why? A: This headphone amplifier supports headphones with 16-150 Ω impedance. Please check the impedance of the headphones. Descriptions: Input/output port: 3.5mm audio port Distortion: 0.004% Signal to noise ratio: ≥120dB Load impedance: 16-150Ω Maximum. Power output: 250mW in impedance 16Ω Amplifier internal voltage: ±4V Charging voltage: DC 5V Frequency response: 20Hz-20kHz (±3dB) Lithium battery capacity: 1000mAh Power amplifier use time: about 6 hours Size: 9.5*6.2*1.5CM Audio cable length: 1M Charging cable length: 95CM Package included: 1*Host 1*USB power supply line 1*Audio cable 1*Instruction