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By certification 
Power supplier: DC5V
Output power: 3W (1KHz,THD10%)
Frequency:100-18KHZ
Signal & noise ratio: ≥85dB
Impedance:4 OHM(Ω)
Li-ion Output: 3.7V~4.2V+0.05V
Li-ion Input: 5V
Lithium battery capacity: 300MAH
Speaker Unit: 40MM
Case Material: ABS
Dimensions: 8*8*3CM
Weight:250g
Color: OEM
Output power: 3W (1KHz,THD10%)
Frequency:100-18KHZ
Signal & noise ratio: ≥85dB
Impedance:4 OHM(Ω)
Li-ion Output: 3.7V~4.2V+0.05V
Li-ion Input: 5V
Lithium battery capacity: 300MAH
Speaker Unit: 40MM
Case Material: ABS
Dimensions: 8*8*3CM
Weight:250g
Color: OEM
