headphones or earpod | apple introduced headphones as earpod

at the launch even of iPhone 5 apple introduced earphones range as earpod

Whats new in eapod ( headphonse)
they have inbuilt microphone :  yes they have inbuild in microphones to make calls .
earpod comes with al;l new apples iPhone and iPod and also available as separate accessory at US$29