Specifications:
Color:As picture
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
Package Include:1PC Headphone Amplifier

Note:
1.Please allow 0.1-0.3cm differences due to manual measurement, thanks.
2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.