Short for organic light-emitting diode, a display device that sandwiches carbon-based films between two charged electrodes. One is a metallic cathode and another is a transparent anode, usually being glass. The organic films consist of a hole-injection layer, a hole-transport layer, an emissive layer and an electron-transport layer. When voltage is applied to the OLED cell, the injected positive and negative charges recombine in the emissive layer and create electro luminescent light. Unlike LCDs, which require backlighting, OLED displays are emissive devices - they emit light rather than modulate transmitted or reflected light.
OLED technology was invented by Eastman Kodak in the early 1980s. It is beginning to replace LCD technology in handheld devices such as PDAs and cellular phones because the technology is brighter, thinner, faster and lighter than LCDs, use less power, offer higher contrast.
Line-in Record
With Line-in cable, you may record music from any audio source device (ex. CD, Stereo, TV!Ketc.) directly into mp3 player to prevent any unnecessary noise while recording. Depends on the function of mp3 player, some may be able to record in mp3 format with better quality, some may only be able to record in wav format, which sometimes will not be as good.
Digital Voice Record
Feature that lets you record class lectures, conversations, music & whatever you want !X through a built-in microphone.
FM Radio Record
Feature that lets you record the Radio content simultaneously while you are listening. Same as Line-in record, it can be recorded in mp3 or wav format.
Bass Boost
A switchable preset equalization circuit/firmware included in mp3 player to compensate for the frequency response limitations of smaller speakers and headphones. Some have 2 or more settings that offer progressive control over the degree of boost.
Connection Transfer Rate
Refers to how fast the music is transferred from your PC to your MP3 player via USB, FireWire or other connection. Typically, measured in MB/sec and the faster the better.
Li-Ploymer Battery
The Li-polymer is a rechargeable battery, it will provide more than three times the energy density compared to the NiCd and will have a very low self-discharge. In addition, the use of a polymer electrolyte allows for very flexible design, including construction of prismatic cells that measure as little as one millimeter (0.039") in thickness. Batteries that resemble flexible rubber mats that can be rolled or formed to fit tight spaces will also be feasible.
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