This mini microphone is a convenient and useful thing. It is plug-and-play with high-quality microphone and high sensitivity no power supply. This is a mini one delicate lightweight easy to carry. It works on all recording apps with nice sound quality. It is compatible with most of the devices with 3.5mm audio jack very useful. - Small and portable plug and play - Mini sized speaker with good loudness and tone - Compatible with Iphone 3g iPod nano 4G Ipod Touch 2G iPod classic 120GB - 3.5mm Jack designed for all audio devices such as iPod Iphone MP3 and MP4 etc.