Item Name: HIFI Fever Level Amp Class A Heavy Bass Mobile Phone Headset Companion Walkman. Product DescriptionOverview:This HiFi Headphone Amplifier supports impedance 16-150 , Delicate, Compact and Portable, Which Make it Convenient to Carry, Can Output Remarkable Sound without Distortion.3.5mm AUX Input and OutputHigh Quality Audio, Suitable for your Mobile Phone MP3 MP4 Laptop PCNoise Reduction Function, and Distortion with Enhanced Dynamics, Perfect Pure Stereo Effect, HD Voice Music Sound Quality OptimizationAluminum Matte Surface, Fashion and Compact DesignNot only suit for music enthusiast, also could be a ideal gift for those who has trouble hearing.TroubleshootingQ: Why there is an buzzing/hissing sound?A: Please don't use it while charging because current disturbance will occur when in charging. That's why there is noise. When fully charged, please disconnect the power supply, and then use the headphone amplifier.Q: This amp doesn't amp high enough for my bigger headphones, and why?A: This headphone amp supports headphones with 16-150 ohm impedance. Please check the impedance of your headphone.Input/Output Port: 3.5mm Audio PortDistortion: 0.004%SNR: 120dBLoad impedance: 16-150Max. Power output: 250mW in Impedance 16Amp Internal Voltage: 4VCharging voltage: DC 5VFrequency response: 20Hz-20kHz(3dB)Lithium-Battery capacity: 1000mAhAmp Using Time: about 6 Hours
