... .Digital USB amplifier 4.Certificate:ISO 9001 5.2.4GHz Wireless Amplier 2.4GHz Wireless AmplifierProfessional Audio Amplifier,Sound Digital Amplifier,Multimedia Digital ... /Function:1.Technology:Built - in 2.4G wireless digital receiver.2.Channels:Digital frequency wireless channel is more than 1000pieces.3. ... .12.With five line wired MIC input,a 2.4G wireless MIC input,three line audio input13.With two ...