**Power supply: DC5V
**Output power: 3W*2
**Frequency: 180Hz——20KHz
**Signal&noise ratio ≥80dB
**Impedance: 4 OHM(Ω)
**Output: 3.7V~4.2V+0.05V
**Input: 5V
**battery capacity: 400mAh 053040
**Speaker Unit: 40*2mm BT-03
**Case Material: Aluminum
**Dimensions: 123*66*48mm
**Weight: 188g
**Color: OEM