Screen size
For digital photo frames, this is the diagonal of the LCD matrix that is actually visible. Measured in inches (inches).
Now on the market there are photo frames with such a diagonal:
6" and less,
7",
8",
9",
10" and
more.
Contrast
This characteristic indicates the ratio of brightness levels between the brightest white and darkest black colours that the display displays. The higher the contrast level, the richer the displayed colour palette of the display.
Supported file formats
All photo frames support graphic formats, the so-called. "picture" files (for example - JPEG, GIF, BMP, PNG, etc.). Often photo frames are capable of playing sound (MP3, WMA, AAC, OGG, etc.) and video files (AVI, MPEG4, etc.). These models are usually noticeably more expensive and come with a built-in speaker/speakers.
Built-in memory
Specified in megabytes. Usually, flash-type memory is used in modern digital photo frames. Sometimes, if the frame memory is not enough, it can be increased by removable flash cards.
Now on the market there are photo frames with such a volume of internal memory:
1 GB,
2 GB,
4 GB.
Supported memory cards
Many modern photo frames have a slot for flash memory cards. This allows you to view photos and videos, listen to music without the "mediation" of the computer. Exporting files from a PC in this case is not required - you can organize viewing of data from a camera, camcorder, etc. in a matter of seconds.
Modern photo frames support one of the following memory card formats:
Secure Digital (SD),
Compact Flash (CF),
Memory Stick (MS),
xD-Picture (xD),
MultiMedia Card (MMC).
Data transfer
— Bluetooth. Technology of high-frequency (radio) communication. It is used for high-speed wireless connection of a PDA with peripheral devices — headphones, manipulators, etc. Unlike infrared ports, receiving and transmitting bluetooth modules do not have to be within line of sight.
— Wi-Fi (Wireless Fidelity). Broadband (high speed) wireless communication standard. Allows you to upload files from a computer to the photo frame quickly, without using cables, memory cards, etc. In some cases, allows you to control the functions of the photo frame directly from your computer.
—
USB(Universal Serial Bus). Recently, more and more phones are equipped with a USB interface, which has long been used in computers and other devices. Currently, interface versions 1.1 and 2.0 are mainly used. USB 1.1 supports data transfer rates up to 12 Mbps, USB 2.0 up to 480 Mbps. Today, the third version of the interface is already being tested, which supports data transfer at speeds up to 4.8 Gbps. All versions are backward compatible with each other. In addition, devices can be charged via USB.
