Dedicated Record Button makes recording fast and simple because you need only to press it to start and stop the recording.
The bigger the screen size is, the better the user experience.
The device has an LCD display with 3 subpixels per pixel, resulting in sharp and crisp images. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.
A microphone port allows connecting external high-end or specialized microphones.
You can set your device to automatically record whenever sound above your designated level is detected.
More microphones result in better sound quality and enable the device to filter out background noise.
Voice recording feature allows you to record voice memos, notes, lectures, etc.
The battery can be recharged and used over again.
Newer USB versions are faster and have better power management.
With a standard mini jack socket, you can use the device with most headphones.