Plantronics Discovery 975 User Guide - Page 8

Charging Your Earpiece Option A Volume Button Call Control Button Option B 4 Checking the Battery Level of Your Earpiece Option A: The LCD display on the charging case will indicate battery level of the earpiece when earpiece is inserted into case. Note The Bluetooth icon on the case indicates the earpiece is connected to your phone. You can receive calls when charging. Option B: With the earpiece powered on, simultaneously press and hold the call control button and the volume button for about 2 seconds. The indicator light flashes red to show the charge level.