Specifications:

Color：Black

Material: Metal

Maximum Power Output: 350mW  32Ωload

Load Impedance: 16-300Ω

Working Voltage: DC3.7-4.2V

Charging Voltage: DC5V

Frequency Response: 20Hz-20kHz(±3dB)

Battery Capacity: 1000mAh (3,7V) Lithium-Battery

Amp Using Time: More Than 8 Hours

Distortion: 0.004%

SNR: ≥120dB

Dimension(L*W*H): 9.5*6.1*1.5cm/3.74*2.4*0.6in