1.Adopt“True Diversity Receiver Circuit”independent technology, built-in new wideband antenna distributor, carrier frequency about 470~900MHz, covers Europe&USA new radio frequency code, two sets of input&output antenna share one set of antenna to improve receiveing distance. 2.Adopt shuttle knob replace traditional complexity knob, easy to use.Colorful display screen,clearly to show operation functions and parameters. 3.AFS automatic frequency search function, search and lock the strongest frequency in actual environment to work. 4.LCD display shows status of frequency,battery power,channel A&B signal,AF and RF signal etc. 5.Adopt strongest mutual inductance signal distribution circuit design,put the best signal cascades to next wireless system. 6.Professional phase-locked loop(PLL) circuit match up with noise lock squelch control technology and digital pilot technology, digital pilot control will make AF signal to be mute to restrain noise when transmitter turn off, meanwhile receiver is mute to cut off interference signal. 7.SQ receiving distance about -65~-100dB can be adjustable,and we has the operation lock key function to prevent misuse. 8.Six group of built-in frequency for stack products use,convenient for performances.