Amazon.com: Garmin Edge 1040 Solar GPS Bike Computer with Garmin Bike Speed 2 & Cadence Sensor 2, HRM-Dual | Cycling GPS Computer with VO2 Max | Cycle Bundle with Black Silicone Case,
Combo Pack - Garmin Edge 520 Plus And Speed Cadence Sensor – Athelin Store
Changing the battery on a Garmin cadence sensor - YouTube