The following criteria were important to me:
- Image quality
- Programming of on / off time
- Automatic start of the slide show after switching also from a USB stick, or SD card
- Longer duration> 10 minutes for an image
- Internal clock must remain intact even when you disable, or continue
- Settings may not be lost in case of power failure.
All these criteria are met the Kodak P736 is the only one of me investigated Picture Frames
to my satisfaction.
The only minor drawback I've found is that there is no switch, which allows you to disable the built-in frame optical switch to prevent unintentional (eg while dusting).