Garmin's Vector 2/2S series power meter pedals utilize these pedal pods to communicate and transmit data via ANT+. It is possible for pods to get damaged in a crash or other unfortunate event, so Garmin sells the CR2032 powered battery pods separately so you can address whatever issues you may have. The pedal pods include an LED light to display important setup and maintenance information

Available in two sizes, Standard or Large, the thickness of the mounting interface is determined by the thickness of the crank arm you are using. Standard replacement pods work with crank arms 12-15mm thick (44mm wide), and the Large fits crank arms 15-18mm thick (44mm wide). You can replace the pods individually or two at a time. Pairing is simple, just follow the instructions.