Customer service
FREQUENTLY ASKED QUESTIONS
Search by categories
Search by category
- Wear OS 3
- NFT
- Trade-In
- Most Frequently Asked
- Accessories
- Using your watch's features
- TAG Heuer Connected mobile app
- Battery & Charging
- Warranty, upgrading and repairs
- Purchasing and returns
- Pairing and set-up
- Troubleshooting
- Watch faces and counters
- Apps on your watch
- Software updates
- Watch specifications
- Golf
- Swimming
- Special Editions
- Wellness
- Watches
- Most Frequently Asked
- Care & Maintenance
- Technical Details
- Aesthetics & Materials
- Straps & Bracelets
- Other
- Timing
- Warranty Extension
- TAG Heuer Connected
- Wear OS 3
- NFT
- Trade-In
- Most Frequently Asked
- Accessories
- Using your watch's features
- TAG Heuer Connected mobile app
- Battery & Charging
- Warranty, upgrading and repairs
- Purchasing and returns
- Pairing and set-up
- Troubleshooting
- Watch faces and counters
- Apps on your watch
- Software updates
- Watch specifications
- Golf
- Swimming
- Special Editions
- Wellness
- TAG Heuer Golf
- Most Frequently Asked
- Features
- Courses
- Troubleshooting
- Privacy & Notifications
- Purchasing
What is a Chronometer?
A Chronometer is a certified, high-precision timepiece that meets the stringent standards of the C.O.S.C. (Contrôle Officiel Suisse des Chronomètres / Swiss Office for Chronometric Controls). Each movement is tested for 15 days, in 5 positions and at 3 temperatures while operating under very demanding conditions. To earn the title of Chronometer, a mechanical movement, either automatic or manual, must meet the 7 criteria defined by ISO 3159 standard and applied by the C.O.S.C. Whatever the external conditions, it must maintain an accuracy of between -4/+6 seconds per day.
Contact Customer Service Hotline :
400-6506-218