Specification: Maximum
power output: 250mW in Impedance 16O
Load impedance: 16-150O
Amp Internal Voltage: ±4V
Charging voltage: DC5V
Frequency response: 20Hz-20kHz(±3dB)
Battery capacity: 1500mAh (3, 7V) Lithium-Battery
Amp Using Time: More Than 8
Hours Distortion: 0.004 %
SNR: =120dB
Dimension (L*W*H): 3.8 * 2.4 * 0.6 inch
Net weight: 102g
Package content: 1 x Headphone Amplifier 1 x USB Power Cable 1 x Audio Cable 1 x User's Manual