Neoteck Portable 3.5mm HiFi Headphone Amplifier

Overview: 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.   Features: Portable Small Compact Audio Stereo Headphone Amplifier is Convenient and Easy to Use 3.5mm AUX Input and Output High Quality Audio, Suitable for MP3 MP4 Mobile Phone Laptop PC Noise Reduction Function, and Distortion with Enhanced Dynamics, Perfect Pure Stereo Effect, HD Voice Music Sound Quality Optimization Aluminum Matte Surface, Give You a Sturdy Feeling Built-in Rechargeble Battery, Charge by Micro USB Cable Power LED and Charge LED Indicator Supported   Atttention!! It is not recommended to use while charging, because current disturbance will occur when in charging. That's why there is noise. When fully charge, please disconnect the power supply, and then use the headphone amplifier.     Technical Specifications Input/Output Port: 3.5mm Audio Input Distortion: 0.003% SNR: ≥1