Class A 16-150 Ohm HiFi Headphone Earphone Amplifier 3.5mm Jack Aux Portable Adjustable Audio Amp For Mobile Phone Music

Specifications: Input/Output Port: 3.5mm Audio Port Distortion: 0.004% SNR: ≥120dB Load impedance: 16-150Ω Max. Power output: 250mW in Impedance 16Ω Amp Internal Voltage: ±4V Charging voltage: DC 5V Frequency response: 20Hz-20kHz(±3dB) Lithium-Battery capacity: 1000mAh Amp Using Time: about 6 Hours Dimension: 9.5*6.2*1.5CM Net weight: 160G Feature This HiFi Headphone Amplifier supports impedance 16-150 Ω, Delicate, Compact and Portable, Which Make it Convenient to Carry, Can Output Remarkable Sound without Distortion. 3.5mm AUX Input and Output High Quality Audio, Suitable for your Mobile Phone MP3 MP4 Laptop PC Noise Reduction Function, and Distortion with Enhanced Dynamics, Perfect Pure Stereo Effect, HD Voice Music Sound Quality Optimization Aluminum Matte Surface, Fashion and Compact Design Not only suit for music enthusiast, also could be a ideal gift for those who has trouble hearing. Package included 1*Earphone Amplifier 1*Audio cable 1*USB power supply line 1*User Manual 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. 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.