The HRM 600 supports both secure and open connections types.

Secure

The secure Bluetooth^® connection type is encrypted and authenticated. For a list of Garmin^® devices that support forming secure connections, go to garmin.com/hrm_connection_types. Some Garmin devices may require a software update.

When the HRM 600 is active and using a secure connection, the LED flashes (2 times) every 5 seconds.

Open

The open connection type supports all Garmin devices that are compatible with heart rate monitors. ANT‍+^® connections and some Bluetooth connections are open. The open connection type is also recommended for Bluetooth pairing with third-party smartwatches, tablets, or fitness equipment.

When the HRM 600 is active and using an open connection, the LED flashes (3 times) every 5 seconds.

TIP: Stay 10 m (33 ft.) away from other heart rate monitors while pairing.