PRECAUTIONS
BF-11 Owner’s Manual
6
* Please keep this manual in a safe place for future reference.
DANGER
Make sure to always observe the basic precautions listed below to prevent the likelihood
of serious injury or even death from electrical shock, short-circuiting, damage, fire or
other hazards. These precautions include, but are not limited to, the following:
Do not open
• Do not disassemble the device or modify it in any way. This can result in the device
bursting, or even an explosion or fire. If the device should appear to be malfunctioning,
discontinue use immediately and have it inspected by qualified Yamaha service
personnel.
Water related
• Do not drop the device into the water.
Fire related
• Do not throw the device into a fire, or put burning items near the device.
Handling
• Do not use or expose the device to extreme heat (such as direct sunlight, near a heater
or in a car during the day) to prevent the possibility of explosion, fire or bursting.
Charge the device and use it in temperature conditions between 0° to 35°C (32° to
95°F) and keep in an environment of between -10° to 45°C (14° to 113°F).
• Do not operate the device or use earphones while driving a car or riding a motorcycle
or a bicycle, since this could result in a serious accident.
• To avoid accidents while walking or jogging, keep the volume low enough to hear
outside traffic sounds and avoid concentrating too closely on the display.
If you notice any abnormality
• If there is a sudden loss of sound during use of the device, or if any unusual smells or
smoke should appear to be caused by it, immediately turn off the power switch and
have the device inspected by qualified Yamaha service personnel.
WARNING
Always follow the basic precautions listed below to avoid the possibility of serious injury
or even death from electrical shock, short-circuiting, damages, fire or other hazards.
These precautions include, but are not limited to, the following:
When exercising
• If you are not in good physical condition (chronic illness, during pregnancy, or other
abnormal conditions), consult your physician before beginning any exercise.
• If exercising causes you any pain or discomfort, immediately get rest and consult a
physician if necessary.
• Make sure that any ear jewelry or accessories you wear do not interfere with the pulse
sensor for accurate heart rate readings. Wearing earrings may cause inaccurate heart
rate detection, which can result in your workout being too strenuous or not strenuous
enough.
PRECAUTIONS
PLEASE READ CAREFULLY BEFORE PROCEEDING
