PH-CX1 Portable Mini AUX Noise Reduction Stereo HD Audio Digital Headphone Earphone MP3 MP4 Amplifier

Features: Portable and Compact, convenient and easy to carry and use Elegant Aluminum Case, Durable and Comfortable handheld feeling Built-in Rechargeble Battery, Charge by Micro USB Cable(DC 5V) Power LED and Charge LED Indicator Supported Operational Amplifier Replaceable function to allow you update the product for higher tone quality conveniently 3.5mm AUX Input and Output, high quality audio, fit 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 Specifications: Maxpower output: 130mW 32 load Load impedance: 16-300 Working voltage: DC 3.7-4.2V Charge voltage: DC 5V Frequency Range: 20Hz-20KHz(3dB) THD: 0.001% SNR: 116dB Size: 105 x 52 x 12mm(4.13 x 2.05 x 0.47in) Package Included: 1 x Headphone Amplifier 1 x 3.5mm AUX Input and Output Cable 1 x User Manual