Are you sure this is the price for speed and cadence sensor?
Product description lists that speed and cadence sensor are both included, but product # (not sku) does not match. I spoke to a customer service rep for almost 30 minutes on the phone waiting for an answer, but she was not able to answer my question and told me to call a store in the morning. This product is listed as "not available at stores", so I can't imagine that they'd have any better answer.