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For quick and easy service, contact us:
 
Phone:  630-761-1106
Fax:  630-761-1107
Toll Free:  888-744-6277
ONYX FIT
How do I obtain the most accurate heart rate measurement with my chest strap? 
My heart rate is displayed correctly only after about 15 minutes. What should I do? 
What are the cleaning instructions for my elastic chest belt? 
What are the care instructions for the fabric chest belt such as COMFORTEX / COMFORTEX+? 
Can I change the battery in my heart rate monitor or running computer myself? 
Can I swim with my SIGMA heart rate monitor or running computer? 
What is the warranty coverage on SIGMA products?

The warranty on SIGMA products in North America is 2 years from the date of purchase. The warranty covers defects in material and workmanship. The warranty does not cover batteries, wear-and-tear, wear caused by commercial usage, or damage caused by a crash/accident. Proof of purchase is required. If your SIGMA product is not functioning properly and you feel that you have a potential warranty claim, please contact SIGMA USA at 888-744-6277 for technical support and/or to receive a return authorization number.
Operating instructions
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