Test - Predicted maximum heart rate. Test - Predicted maximum heart rate. The S510 is the cycle version of the S410. The main functions are the same with the addition of a larger display.
Cadence is an optional extra.
Test - Predicted maximum heart rate. The S710 is the cycle version of the S610. The main functions are the same with the addition of a larger display and temperature. Cadence and power output are optional extras. Test - Predicted maximum heart rate.