Custom MP3/MP4/MP5 Players We have a variety of mp3 Players (audio only) to meed your promotional, marketing, and retail needs. All can be personalized with your logo. Some optional features include FM radio tuner and built-in microphone for voice recording. Please click on a model below to see larger images, samples from clients and further product details. Our customizable Portable Media Players (including MP3/audio players and MP4/audio + Players) are available with a wide variety of feature sets. All of our models are flash-memory based, making them ideal for excercise and portability in general; they are not based on traditional hard drives which have moving parts and can be damaged by physical activity.