Three sets of Polar speed and cadence sensors, plus one bike mount. - Brand: Polar - Model: Speed Sensor and Cadence Sensor Set - Included: Bike Mount for Polar Sports Watches - Sensor Type: Speed sensor and cadence sensor - Set Contents: Sensors, mounts, and mounting accessories - Condition: Used - Color: Black I am selling these because I have retired from cycling. I had these sets on three bicycles. I believe the batteries still have plenty of life left. I will not sell these individually. No returns. Thank you for looking. Please consider that these are used items before making your decision.