The iPod Nano 4th generation with 16 GB storage capacity is a compact USB MP3 player by Apple. It features a headphone jack for audio output and is compatible with MP3 media format. With a sleek design and a 1-year manufacturer warranty, this iPod is perfect for portable audio playback on-the-go. Additionally, its compact flash memory type and USB 2.0 connectivity make it easy to transfer and listen to your favorite music files anytime, anywhere.