2.4G Portable Voice Amplifier With Microphone,plug and play

output power: 5W
battery: 18000mAh 
working time: 8-10hours
frequency rate: 180Hz-18kHz
charging time:3hours
Bluetooth version: 5.3
Function configuration: Supports Bluetooth 5.3, TWS Bluetooth series connection, TF card , AUX audio input port, and 3.5 microphone input port
application: teaching ,training and amplifying, tour guide explanation, crowd diversion promotional shouting, etc.