Finger Pulse Oximeter Oxy 4 (SPo2) Defibtech training electrodes Its main compartment has a ELITEEMAIR Its main compartment has a flap which divides the main body into two separate high capacity compartments with either mesh or PVC pockets that allow the user to storage all the required medical material and equipment including: small in size and easy to take accurately measures SpO2 value and pulse rate value dual color display of SpO2 Pulse rate 30 240 bpm innovative 4 directions display automatic power On Off more than 30 hours continuous working with 2 AAA alkaline batteries audible and visible alarm function battery voltage indication