Designed for speed and inspired by the grille of a sports car, HUAWEI WATCH GT Runner features hole architecture to enable a more breathable and comfortable wearing experience The durable polymer fiber case, offset with a ceramic finish and crown Aircraft-grade titanium alloy combine to create a strong, lightweight, and comfortable design at around 38.5g1 that will help you perform better. Experience reliable readings, equal to those from a chest strap, with 97% accuracy within 10ppm.