Sennheiser NOISEGARD HMEC 305 - Manual (Page 11)

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Connecting cable for
HMEC 322 and HMDC 322
HMEC 305-C headset:
1 XLR-5 plug for connecting the headphones and the microphone
1 XLR-3 plug for connecting the power supply for the NoiseGard™
electronics
HMEC 306 headset:
1 6-pin Redel plug for connecting the headphones, the microphone and the power
supply for the NoiseGard™ electronics
HMEC 322 and HMDC 322 headsets:
1 U-174/U jack plug for connecting the headphones and the microphone
1 XLR-3 plug for connecting the power supply for the NoiseGard™
electronics
Connecting cable for
HMEC 306
Connecting cable for
HMEC 305-C