1.amp,receiver,RS232,USB 2.linking time 3 seconds 3.iso,ce,fcc,rohs certificate 4.DC 6V amplifier 5.amplifier 2*30W 2.4g portable wireless receiver amplifier,bluetooth amplifier,wireless amplifier Function/ Strong point1.Built - in 2.4G wireless digital receiver.2.Digital frequency wireless channel is more than 1000pieces.3.The transmitter connect with receiver is less than 3seconds.Frequency ...