Silicone housing with security pin and soft material, will keep it properly attached on Pocket / Stethoscope. Ideal for infection prevention and control, Dial can be separated from casing easy to sterilize, Suitable for nurses and any other medical professional (medical clinic workers). Widely Used for Traveling Hiking, Running, Mountain Climbing, and Outdoor Sports, also for the Work indoors, such as Hospital, School, Supermarket, Office, Bank.