Yeah, you are right. They are excellent to use, that is why this is a reluctant sale and I would never get rid of the pair. No cheapy stupid IR required. They use Image Intesifier Tubes which give clear pic in total black, Nice compact design too unlike many of the bulky eastern european ones I have seen. Any one else got any Ideas? Think I would throw in a few of the Batterys too, they cost about £40 each.