The following Table summarizes the technical details of the Bluetooth and
WidexLink technology as it is implemented in the COM-DEX Remote Mic.
Unit COM-DEX Remote Mic Hearing aid
Type Bluetooth* W-link
Antenna type Embedded ceramic an-
tenna
Inductive antenna
Antenna dimensions NA Ø1 .8 mm
L – 4 .85mm
Modulation FHSS/GFSK,
π/4 DPSK,
8DPSK
FSK
Magnetic Field Strength NA -54dBμA/m at
10m distance
Output power 2.5 mW EIRP
+4dBm
29pW EIRP**
-75 dBm
Range <10m between COM-
DEX Remote Mic and
Bluetooth device
<1m remote unit to
hearing aid
<30cm be- tween hear-
ing aids
Center frequency 2 .45GHz ISM 10.6MHz
Channels 80 channels Single channel radio
83
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