2.4G USB wireless microphone 1.it convenient for you to medium 2.teaching,speeching, ... meeting,singing at stage,etc 3.30W 2.4G USB wireless microphoneThis product is digital portable amplifier with USB port and ... .25KgsStandard Configuration:1 pc main machine(Amplifier) 1 pc Headset Microphone(5 different style for choose) 1 pc 9V/1A charger ...