Built-In Memory: Store 1 heart rate training session.
Perfect for sports and activities where a wrist unit would be difficult to use.
Firmware updates that enhance the functionality.
Operating temperature -10 °C to +50 °C/14 °F to 122 °F.
Enhanced Battery Life: 400 hours of operation time on a user replaceable.
Fits chests measuring 22 to 34 inches.