Can make one AV system(such as CD/DVD/ROM etc) conect with 4 TV systems at the same time. GTS-GTS-069-30 AV DISTRIBUTION AMPLIFIER(1 INPUT/4OUTPUT)spcification:Input:Audio-R/L*1,Video*1,S-Video*1(Option)Output:Audio-R/L*4,Video*4,S-Video(Option)Power:AC 110V/220VWeight:326gDimension:18*9*3.2cmPackage:20pcs/Ctn,Measurement:0.052CBM (GTS-069-30) AV DISTRIBUTIOM AMPLIFIER(1 INPUT/4OUTPUT)