I would avoid it but for free, what do you lose? This is what I found out about it:
Now the bad news. I can only describe the picture and sound quality of the DTA1030D I purchased as POOR when used with it's internal RF modulator. the picture had moire patterns (internal interference), poor gamma/chroma relationship (unnatural colors in dark objects) and obvious buzzing in the audio when tested on three different TV sets. An external RF modulator ($13 at Family Dollar) solves the problem, providing fine picture and sound, but it makes more sense to buy a CECB with an acceptable internal RF moduator anyway. I cannot recommend the DTA1030D to someone who intends to use it with an older TV that lacks video/audio inputs (e.g. the 5" battery-powered B&W I had intended to use it with).