SHIDU M700 Wired Voice Amplifier for Teacher (13W, Bluetooth 4.2, 1800mAh)

Output Power: 13W | Model: M700 | Bluetooth Version: 4.2 | Bluetooth Distance: 10m | Battery Capacity: 1800mAh | Amplifying Service Time: 7–8 Hours | Music-Use Time: 5–7 Hours (Medium Volume) | Charging Voltage: DC 5V | Frequency Response: 90Hz–18KHz | Horn Size: 3-Inch Double Magnetic Speaker | Product Size: 140×84×48mm | N.W.: 282g | Appearance Technology: ABS | Format Support: MP3 / WMA / WAV | Functional Interface: TF Card / USB / DC5V / AUX / MIC