Power output: RMS 3W*1
Frequency response range: 1800Hz-80KHz
Signal-to-noise ratio: ≥80db
Sensitivity: 500mv
Impedance: 4HM(Ω)
Input: DC 5V
Speaker unit: 4Ω3W *13 core
Battery Play Time Moderate Volume: 3 Hours
Battery capacity: 300mAh
Size: 602030 Polymer
Charging time: 2-3 hours

Product size: height 74mm, maximum diameter 77mm