Voice Amplifier Portable Mic Wireless Microphone Loud Speaker Teachers Speaker With Microphone 2200 mAh Mini Bluetooth Microphone for Teachers Class

【Specification】     product name: multifunctional loudspeaker     Material: rubber spray paint + ABS plastic     Size: 9.28.42.8cm     Use time: 20 hours     Weight: 200g (including lithium battery)     AVAILABLE COLORS: BLACK/WHITE/ROSE GOLD     Input signal: microphone     Charging time: 3 hours     Battery capacity: 2200mAh 18650 battery     Function: teaching/tour guide/headset microphone/meeting/training/listening to music, etc....     【Features】     Small size and long battery life, up to 20 hours of use     The knob controls the volume, which is very convenient for most users.     Applicable to: teaching/tour guide/headset microphone/meeting/training/listening to music, etc....     Support USB disk and TF card to play music     【packing list】     1Amplifier     1headset     1Strap     1English manual     1*charging cable