Features: brand new and high quality Lightweight to wear, no burden on the wrist, no barriers to operation. High-quality TPU is fold-resistant, for always close to for protection. Side-covered side for key design, the keys protrude on the surface of the for case, which is convenient for blind for touch pressing, and the side keys are covered with hollow processing, which does not affect the appearance and reduces the triggering force of pressing. The digital appearance position structure is specially optimized, which does not block the appearance and is easy to operate. The real machine opens the mold, one-piece molding, the hole position is accurate, and does not affect the use of the buttons and the roulette. It can be charged without blocking. The side-enclosed protects the dial to prevent daily accidental bumps. Specifications: Material:TPU Size:Approx.4.6cm/1.81inches Color:Transparent Blue/Transparent/Transparent Black/Transparent Gray for Polar vantage for M/M2 Package Includes: 1x Protective for Case note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.