iBike Gen III Operating Instructions Manual page 24

IBIKE WIRELESS SENSOR TYPES
There are two different types of iBike wireless sensors.
iBike Wireless Sensors, years 2007 to 2010:
The wireless iBike speed and cadence sensors (model BKM3, model number shown just
below the ANT icon) were shipped between 2007 and 2010 and look like this:
The original HR strap (model HRM1B) looks like this:
The 2007-2010 series sensors have the characteristic that, when the sensor battery is
removed, the sensor forgets its prior wireless ID. Whenever a new battery is inserted,
the sensor creates a new wireless ID. So, each time a new battery is inserted in to
any of these sensors, a new "Scan" process needs to be performed so that the new wireless
ID codes can be memorized by the iBike.
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