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By certification 
Power supplier:DC5V
Output power:3W
Impedance: 4 OHM(Ω)
Frequency: 100Hz-18KHz
S/N: ≥95dB
Speaker Unit:40mm
Dimensions 15.4*7*4.5cm
Battery Capacity: 1200MAH
Case Material : ABS + Silicon
Weight:228g
Color: OEM
Output power:3W
Impedance: 4 OHM(Ω)
Frequency: 100Hz-18KHz
S/N: ≥95dB
Speaker Unit:40mm
Dimensions 15.4*7*4.5cm
Battery Capacity: 1200MAH
Case Material : ABS + Silicon
Weight:228g
Color: OEM
