Features Tiny, light, "all-in-one" integrated clip design, easy for carrying; LED screen with SpO2, PR and Pulse strength Features 1. Tiny, light, "all-in-one" integrated clip design, easy for carrying; 2. LED screen with SpO2, PR and Pulse strength measurements; 3. Immediately, real-time spot-check; 4. Single button interface, easy for operation,5. Common AAA alkaline or rechargeable batteries ...