lkv820 image freezing board connection diagram is for managing image. have osd / led prompt function. be the same with iatrical equipment etc professional realm ways: 1/4 image freezing. 1/2 image freezing. all image freezing. choics image can be blowup for seeing lkv820 main application field of iatrical equipment etc professional realm.function can be changed based on client's need 1 channel complex video output/input,1 channel av signal output/input - image freezing function: - whole image freezing. - 1/2 image freezing(up-and-down) - 1/2 image freezing (left-and-right) - 1/4 image freezing - osd manu prompt function .led estate prompt - after image freezing any image can be blowup for seeing in any mode managing image. have osd / led prompt function. be the same with iatrical equipment etc professional realm ways: 1/4 image freezing. 1/2 image freezing. all image freezing. choics image can be blowup for seeing contact:catherine 86-755-82501733 13168722762 msn:catherine4531 at hotmail.com skype:cable-annie. hello:catherine4531