The new version adds a wire inside Xiaomi piston headphone, specially as the microphone cord. This is to reduce cross- interference between the headset and microphone, to let calls more stable.Fully compatible with Xiaomi phones, and new support for part functions of iPhone, iPod and other iOS devices ( volume "+ ", " - " button on IOS devices is still not operational ) .
Special additional cord inserted into the microphone reduces interference between the headphones and
microphone,and provides more stable calls. Fully compatible with most Android devices. Also partially supports the iOS devices (excluding the volume up/down functions).