HiFi Headphone Earphone Amplifier 3.5mm Jack Aux Audio Amp for Mobile Phone, 501 Original

Class A 16-150 ohm HiFi Headphone Earphone Amplifier 3.5mm Jack Aux Input Portable Adjustable Audio Amp for Mobile Phone Music PlayerFeature:Aluminum matte surface, stylish and compact design.3.5mm AUX input and output.Support 16-150Ω impedance, exquisite and portable, easy to carry, can output excellent sound without distortion.High-quality audio, suitable for your mobile phone, MP3, MP4, laptop.Noise reduction function, enhanced dynamic distortion, perfect pure stereo effect, high-definition voice and music sound quality optimization.Specification:Product name: Headphone amplifierProduct color: BlackInput/output port: 3.5mm audio portDistortion: 0.004%Signal to noise ratio: ≥120dBLoad impedance: 16-150ΩMaximum power output: 250mW in Impedance 16ΩAmp internal voltage: ±4VCharging voltage: DC 5VFrequency response: 20Hz-20KHz (±3dB)Lithium battery capacity: 1000mAhAmpere usage time: about 6 hoursBody size: 9.5x6.2x1.5cm/3.74x2.44x0.59inPower cord length: 95cm/37.4inAudio cable: 1m/3.28ftProduct weight: 160gWhy 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.This amplifier is not high enough for my bigger headphones. Why?A: This headphone amplifier supports headphones with 16-150 ohm impedance. Please check the impedance of the headset.Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2mm measuring deviation due to manual measurement.Package Content:1 X Amplifier1 X Audio Cable1 X USB Power Supply Line