Icom IC-F70 / F80 Instruction Manual - Page 40

8 SPEAKER-MICROPHONE I Optional HM-138 description Alligator type clip To attach the speaker-mic. to your shirt or collar, etc. PTT switch Transmits while pushed Receives while released I Attachment Attach the connector of the speaker-microphone into the [SP/MIC] connector on the transceiver and tighten the screw. Microphone Speaker NEVER immerse the connector in water. If the connector becomes wet, be sure to dry it BEFORE attaching it to the transceiver. NOTE: The microphone is located at the top of the speaker-microphone, as shown in the diagram above. To maximize the readability of your transmitted signal (voice), hold the microphone approx. 5 to 10 cm (2 to 4 inches) from your mouth, and speak in a normal voice level. 36 CAUTION: Attach the speaker-microphone s connector securely to prevent accidental dropping, or water intrusion in the connector. IMPORTANT: KEEP the connector cover attached to the transceiver when the speaker-microphone is not in use. Water will not get into the transceiver even if the cover is not attached, however, the terminals (pins) will become rusty, or the transceiver will function abnormally if the connector becomes wet.