The John Bunn Finger Pulse Oximeters by Graham Field are clinical-grade diagnostic tools designed to provide immediate readings of blood oxygen saturation (SpO2) and pulse rate. These devices feature a lightweight, pocket-sized construction that accommodates a wide range of finger sizes, from pediatric to adult. Equipped with bright LED displays and simple one-button operation, they offer multi-directional viewing angles for convenience in clinical or home settings. Integrated power-saving technology ensures long battery life by automatically shutting off after inactivity, making them essential for EMS, hospital, and residential monitoring.