General Recommendations - Philips DL879X User Manual

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If you have doubts about the accuracy of the measurements by the watch,
stop using the watch and read the troubleshooting section. If you cannot find a
solution there, please contact Philips Consumer Care or visit www.philips.com/
support. Accurate measurement relies on three key factors: Placement of the sensor
in direct contact with the skin, transmittance of light through the skin, and sufficient
blood flow through the skin. There are conditions where accurate optical heart rate
measurement is not possible.

GENERAL RECOMMENDATIONS

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Read this user manual carefully and always follow the instructions.
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Do not use this watch for any other purpose than what it is intended for.
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Make sure the device is in proper working condition before use.
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