Power On / Off 2. Battery Door 5. Volume Control 3. LED Insert Batteries 1. Locate the battery door on the each earcup. 2. To open the battery doors, depress the button at the top of each door, and pull the door outward from the earcup. 3. Insert 2 "AAA" batteries. 4. Close battery doors. Turn on wireless operation 1. Locate the power on / off button on the left earcup. 2. Press button to "on". 3. The LED will be red when the unit is powered on. Set Volume Control 1. Locate the volume control on