FH-10S Single Ear Radio Transmit Headset

Radio Transmit: Red PTT
Activates radio transmit. Mic is always live for intercom communication. Appropriate for driver or officer positions. Used on UH-10, FH-10, UH-10S, and FH-10S headsets.

Intercom Only : Black PTT
Activates mic for intercom communication ONLY. Appropriate for jumpseat positions. Used on UH-20 and FH-20 headsets.

Intercom Only : Yellow PTT
Activates mic for intercom communication ONLY. Appropriate for jumpseat positions. Allows for hands-free intercom communication. Used on UH-40 and FH-40 headsets.