Simple press one of three buttons to answer call , and other to adjust volume New way of using your mobile phone at home and office as a receiver. Compatible with iPhone 4, 3GS, 3G, iPod Touch Models (for Skype calls) and other wireless phones with 3.5 mm headphone plugs. Also for PCs , Tablet Pcs and iPad! Able to connect iPhone data/charging cable while phone is in place. No pairing required ...