Nokia Purity HD Headset User Manual page 6

An additional cable with microphone is included
for use with specific Nokia models. Included adapter
is Nokia AV compatible with legacy Nokia phones
with a 3.5mm plug.
Recycle
Always return your used electronic products,
batteries, and packaging materials to dedicated
collection points. This way you help prevent
uncontrolled waste disposal and promote the
recycling of materials. Check how to recycle your
Nokia products at www.nokia.com/recycling.