Reset your Leitner Premium Plus Headset

Take your headset off the charging base and unplug the power cord from the base.
Remove the battery from your headset for 30 seconds, then slide the battery back into the compartment.
Plug the power cord back in and hold the Telephone Mode button on your base until it starts to flash purple.
Press and hold the On/Off button on the headset until it flashes blue, then let go. It'll begin to flash purple.
When the charging base and headset have stopped flashing, you're good to go!