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.
50% have it
2. has a rechargeable battery
The battery can be recharged and used over again.
64% have it
Philips VTR5600/93: 37g
4. internal storage
Sony ICD-SX1000: 16GB
5. Records onto a SD card
You can record your lectures, music, notes, ect. directly to a SD card, which gives you more flexibility regarding storage.
47% have it
6. Has a background noise filter
The device has a filter to reduce background noise.
26% have it
7. has a socket for a 3.5 mm audio jack
With a standard mini jack socket, you can use the device with most headphones.
8. Has a dedicated Record Button
Dedicated Record Button makes recording fast and simple because you need only to press it to start and stop the recording.
96% have it
9. Is capable to record voice
Voice recording feature allows you to record voice memos, notes, lectures, etc.
99% have it
Philips VTR5000/93: 21.6mm
Olympus DP-201: 95mm
Sony ICD-TX50: 6.4mm
13. 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.