mobile phone handset:

The materials used are environmentally friendly materials on the human body without any harm, either to prevent the cell phone electromagnetic waves, it also brings a new communication beyond the traditional fun of headphones

1, Coneect the cell phone with the microphone 2, Plug Adapter compatible with mobile phones (each microphone is default to connect with three connectors: new and old Nokia paragraph, Sony Ericsson, the other we have  to buy) 3, cell phone transferred to "hands-free" or "Press any key to answer" status. 4, press the answer button on the phone can receive calls.