Instruction Manual of Model 6021 Binocular Walled Talkie with Megaphone A) Battery Installation Open the battery door with screwdriver, insert 1 pe 9V (6722) or equivalent battery and close the door, B) Operation for Talkie Talkie 1H Pull out the microphone (59) at the bottom 2) Select Talkie Talkie mode 3) Turn the HOLLOWAY ) for adjusting the sound level. 4 Press PTT button (85) Frau transmitting, speaking clearly in a normal voice. 5) Release PTT button (45) for receiving.