The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
49% have it
3. Has an automatic recording
You can set your device to automatically record whenever sound above your designated level is detected.
84% have it
4. has a rechargeable battery
The battery can be recharged and used over again.
64% have it
5. Has a noise cut function
The noise cut function make play-back clearer, with low background noise.
24. Can synchronize your documents with a USB drive
The device can save and synchronize documents with the USB drive.
12% have it
25. every pixel has three subpixels
The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.