Can share audio and video signal and remote signal pass back; Can be used on multi places (most 4 places) watching programmes on the same STB. Easy installation, practical, good effect. Features: With 4-Ch network port output and one-channel AV port output Anti-interference design, active distribution circuit, each group has individual amplifying circuit, improve sound quality. High sensitivity and strong compatibility, no need manual frequency modulation, auto capturing, suitable for all STV with IR receiving. Specifications IR recelve frequency range: 34KHz~60KHz IR transmlt frequencies: 38KHz~56KHz Emitter Range: 100mm~200mm Video Intput: 0.8~1.2v fixed 75 ohm Video Output: 0.8~1.2v fixed 75 ohm 6DB output Driver Gain Audio Input: 0.2~2V Audio Output: 10DB Output Driver Gain