Polar T31 Replacement Elastic Strap (Large)

The inventor of the fingertip pulse oximeter brings you the same technology trusted by healthcare professionals to reliably monitoring pulse rates and blood oxygen saturation levels
Accommodates a wide range of finger sizes from pediatric to adult; no calibration needed
Reliable, accurate, immediate readings to live a more active life; can be used by a variety of sports enthusiasts, especially at higher altitudes, and others interested in measuring oxygen saturation and pulse rate

Armband heart rate monitor and calorimeter that requires no chest strap or special watch
Calculates calories burned, target exercise zones, and average, maximum, and minimum heart rates
Full-color, programmable OLED graphic display; rechargeable 3-volt button cell battery

360 DEGREE REFLECTIVITY from logos, straps and our spin dial get you seen at night and a DETACHABLE VISOR keeps the sun and rain out of your eyes
MAGNETIC BUCKLE and a soft chinstrap makes one handed operation easy and means no pinching of your neck
ABS shell with EPS inner foam lining meets both CPSC (for cycling ages 5+) and ASTM-F1492 (for skateboarding & trick roller skating) certifications

Men’s heart rate monitor watch with stylish black/silver housing
Measures heart rate in bpm, includes audio and visual target zone alarm
Energy pointer indicates whether workout is improving fitness or burning fat