Plantronics ML Series Getting Started Manual page 5

TIPS
Understand the Tones You Hear:
This headset beeps different tones to advise you on what it is
doing.
Usually, a high tone requires you to act (e.g. you lost the
Bluetooth connection or need to recharge battery) but a low
tone is just a reaction to you pressing a button (e.g. volume
changes, call start/end).
Stay Near Your Phone:
Bluetooth has a working "range" of up to 30 feet between the
phone and headset before audio degrades and the connec-
tion is lost.
Know How to Reconnect:
Your headset tries to reconnect a lost connection. If it can't,
then tap the Call button once or manually reconnect via the
phone's Bluetooth device menu.