Heart rate sensorsT31 coded transmitter WearLink®+ transmitter WearLink®+ Strap Polar WearLink®+ transmitter with Bluetooth® H7 heart rate sensor T31 transmitter WearLink®+ transmitter W.I.N.D. Polar WearLink®+ transmitter Nike+ WearLink®+ Hybrid transmitter Soft strap Cycling sensorsCS cadence sensor W.I.N.D. CS cadence sensor CS speed sensor W.I.N.D. and Twist Lock Bike Mount CS speed sensor CS speed sensor W.I.N.D. and Dual Lock Bike Mount set CS Speed Sensor W.I.N.D. and Universal Bike Mount Set Running sensorss3+ stride sensor s3 stride sensor W.I.N.D. S1 foot pod GPS sensorsG5 GPS sensor G3 GPS sensor W.I.N.D. G1 GPS sensor Data transferIrDA USB Adapter WindLink FlowLink® DataLink Other accessoriesTwist Lock Bike Mount Battery set for s3 and s3+ stride sensors Elastic Straps Magnet set Speed Sensor CS GPS Strap G5 GPS armband CS Pouch Cardio Sports Bra Battery set for FT7 and FT4 GPS Clip Universal Bike Mount Battery set for RCX5, RS800 and RS400 WearLink® Connector Battery Set Magnet set Cadence Sensor CS s3+ holder Battery set for CS600, CS500 and CS400 Battery set for RCX3, FT80, FT60, FT40 and FA20 Share Battery set for RCX5, RS800 and RS400 It couldn't be easier to change the battery in your Polar product. This set includes a CR2032 battery and sealing ring for easy and quick replacement. Battery set for RCX5, RS800 and RS400$6.95 View all compatible products Compatible Products RCX5Optimized TrainingRCX5 Tour de FranceOptimized Training in a Limited EditionRS400Advanced Running FeaturesRS800CXMaximum Performance for Endurance SportsRS800CX Multisport GPS PackMaximum Performance in a Limited Edition