POLAR VERITY SENSE optical sensor (Size: M-XXL)

Polar Verity Sense - optical heart rate monitor with internal memory. Works with Bluetooth and ANT+ connection.

This heart rate sensor is placed on the arm (forearm or bicep) or on the strap of swimming goggles.
Rechargeable battery that lasts up to 20 hours.

The sensor can record your workouts on its own - internal memory holds up to 600 hours of heart rate training.
Bluetooth Smart sends heart rate information to your Polar monitor or smartphone (compatible with Polar Beat or third-party apps).
Can record distance and speed in the pool.
Extremely light and small (the sensor weighs just 5 grams and the elastic band weighs about 12 grams).
Water resistance up to 50 m.
Signal transmission range to another device: up to 150 meters.