1. INTRODUCTION | 4  | 
1.1. HOW TO START TRAINING | 4  | 
1.2. CARE AND MAINTENANCE | 5  | 
1.2.1. Care of the Suunto X3HR  | 5  | 
1.2.2. Care of the Transmitter Belt  | 5  | 
1.3. WATER RESISTANCE  | 5  | 
1.4. BATTERY REPLACEMENT  | 6  | 
1.5. BATTERY REPLACEMENT OF THE TRANSMITTER BELT  | 8  | 
2. HOW TO USE YOUR SUUNTO X3HR  | 9  | 
2.1. DISPLAY  | 9  | 
2.1.1. Function symbols  | 9  | 
2.2. BUTTONS | 10  | 
2.2.1. Short and long press  | 10  | 
2.2.2. START/STOP button  | 10  | 
2.2.3. SET button  | 10  | 
2.2.4. ARROW UP/LIGHT button  | 11  | 
2.2.5. ARROW DOWN/LAP button  | 11  | 
2.3. NAVIGATING IN THE FUNCTIONS  | 12  | 
2.4. HEART RATE MONITOR AND TRANSMITTER BELT  | 14  | 
2.4.1. Activating the heart rate monitor  | 14  | 
2.4.2. Electromagnetic interference  | 14  | 
2.4.3. Warnings  | 14  | 
2.4.4. The Suunto X3HR and transmitter belt usage in water  | 15  | 
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