Polar Electro S625X User Manual page 127

With the following accessories you get the most out of your S625X
IR Interface:
The Polar IR interface is designed for communication between
Polar heart rate monitors and Polar software products. For
infrared connection to your PC you need a Polar IR interface
if you do not have an IrDA port in your PC.
Polar Bike Mount:
When you go biking, attach the wrist unit to the Polar Bike
Mount.
Polar Speed Sensor:
A wireless sensor that measures speed and distance when
cycling.
Polar Cadence Sensor:
A wireless sensor that measures the frequency at which you
turn the pedals of your bicycle.
Power Output Sensor:
The Polar Power Output system measures pedaling power when
cycling. It also measures left/right balance (LRB describes the
share of power output of left and right as a percentage),
pedaling index (describes how evenly power output was
produced during a cycle round), speed, cadence and distance.
If you use the Power Sensor, you do not need to mount any
other accessories on your bicycle.