heya! i cant answer your question LOL i just saw that your from davao. yow man i dont know where to post this i just wanted to ask what device should i use in synchronizing 3 DVRS? i only have 1 LCD tv and i dont want to waste $ and buy 2 additional tvs just to view the other 2 dvr. maybe a multiplexer or something like that can help me but iam not really sure and dont even know what device should i use. i just succesfully installed the 48 cams on the 3 dvrs. also, i have 1 spare camera and i am thinking of placing it in my elevator. btw i have a 4 floors apartment. thanks for reading and hope you can help.