Our screw-buckle silicone bands are engineered for a universal fit, with specific adjustments for regional standards.
[ BOXED SIZE DIAGRAM ]
Wrist Category
America (US/EU)
Asian (AS/CN)
Fit Type
Standard (S/M)
5.5" – 7.1"
140mm – 180mm
Snug/Active
Extended (M/L)
6.3" – 8.3"
160mm – 210mm
Relaxed/Casual
One Size (OS)
Universal Adjust
Universal Adjust
Infinite Fit
💡PRO-TIPS: HOW TO USE ACCURATELY
Maximize your Ultra experience based on your specific style:
📍FOR ALL SIZES:
Precision Mapping:Open your smartphone's companion app (FitPro/Wearfit) before starting your workout to sync the high-precision route tracking from your phone to the watch face.
💨FOR THE TECH-SAVVY:
Automatic Dust Care:Your watch is IP67 rated. If exposed to dust or fine particles, simply wipe with a microfiber cloth. The sealed casing ensures no dust enters the internal electronics.
🎨COLOR-SPECIFIC CARE:
Yellow & Orange (High Visibility):Use a damp cloth to clean the silicone band weekly to maintain the "Neon Pop" brightness.
Black & White (Minimalist):These bands feature a matte-finish; avoid harsh chemicals to keep the texture smooth.
🧰IMPORTANT PRODUCT CARE
🧼Cleaning:Use non-abrasive soap and lukewarm water for the band.
🚫Deep Sea:IP67 is splash-proof; remove before deep-sea diving or hot saunas.
⚡Charging:Use the included wireless magnetic dock ONLY for optimal battery health.