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 ... :0.25KgsStandard Configuration:1 pc main machine(Amplifier) 1 pc Headset Microphone(5 different style for choose) 1 pc 9V/1A charger ...