Instruct: Classify an Amazon review as either positive or negative.
Query: Doesn't work for me.

When it is working, the picture quality is good for being an RF device. It isn't amazing clear or anything, just acceptable for RF. HOWEVER (and it is a very big however), this device only works when it senses a video signal. Not uncommon in these types of devices, but this one cannot tell the difference between black video and no signal. So, whenever the video signal fades to black, it cuts out. And it is pretty sensitive to it as well, so in the middle of a video that fades to black between scenes there is a loud pop and the video turns to snow. I would be using this device in a corporate environment to power a few TVs around our lobby, and this completely does not work for me.