-High brightness OLED display SpO₂, PR, and pulse bar
-Visual prompt when SpO2<90%, PR<60bpm or >100bpm
-Low power consumption; real-time battery status indication
-Weak or unstable signal prompt mark helps for more accuracy
-Level 1 - 10 brightness
-Special battery cover design provides more durability
-2pcs AAA-size batteries
-Automatically power off