FCC ID: LWAMKI15ENE TES 1 Alter battery installation, turn on the unit by rotate the OFF/ON/VCOLUME knob (F) clockwise and when you see the LED power indicator (E) glows with noise from the earpiece (C}, the units 'ON'. 2 Push the Press-To-Talk button {B} io talk and release to listen. Talk direct to the mouth piece {D} wile the unit inches) from your mouth, 3 Adjust the volume by rotate the OFF/ON/VOLUME knob (F. » The range can alter depending upon the environment in which it is used.