USER MANUAL
3.3. Adjust the strap length to fit your chest tightly and comfortably, make
sure the wet electrode area touch firmly with your skin(make sure HR40’s left
side and right side should be the same as your left hand and right hand).
Wear the device near your heart to get stronger heart rate signals.
Poor connection or occasional loosening will be caused if wearing the strap too
loose, please adjust the strap length properly to fit your chest and get effective
connection.
4. PRODUCT MAINTENANCE
Proper maintenance as below will lengthen the working time of HR40.
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