Product size : 197*238*72MM
Output power RMS: 3W*2
Speaker impedance:4Ω*2
Frequency response: 120Hz-13KHz
Speaker size: ￠45MM*2
charging: DC 5V    Voltage: DC 3.7V:
battery inside: 3.7V    1500mA       playing time :≥   5H (volume 50%)