Plantronics Explorer 210 - Manual (Page 7)

3
Pairing Your Headset
Pairing is the process of introducing your headset to your phone.
Before using your headset for the first time, you must pair it with
your Bluetooth phone. Normally, you need to pair your headset with
your phone only once.
Plantronics QuickPair ™ Technology
Your new headset includes Plantronics QuickPair technology to simplify
the Bluetooth setup process. The first time you turn your headset on,
your headset automatically enters pairing mode for 10 minutes (the
indicator light flashes red and blue). Once paired successfully, your
headset stays on for instant use.
If not successfully paired after 10 minutes, your headset automatically
goes to standby mode. When you turn the headset off then on again,
it automatically goes into pairing mode until successfully paired with a
Bluetooth phone.