IX004W Small and portable， plug and play， no battery needed. With microphone function for recording. High quality microphone with fine sensibility and excellent recording quality. Compatible with iPod nano 4GB， iPod classic 120GB， iPod touch 2G and iPhone 3G and other audio devices such as MP3 etc. 3.5mm plug.   Package Details Weight: 12.84 g Size: 12*7.5*1.5 cm Package Includes 1 × Mini Microphone for iPod/iPhone