1 It is light and durable, cheap and practical. 2 Don't worry about the items in the box slipping when you carry it with you. You can take it with you. 3 The universal size is suitable for most finger oximeters. You need to compare the oximeter with the corresponding oximeter before buying to avoid unnecessary trouble. 4 The pressure-resistant, shock-resistant, and waterproof materials provide sufficient protection to prevent bumps, scratches and splashes. 5 It provides great protection forpulse oximeter.