The BCI® 3301 Hand-Held Pulse Oximeter quickly and reliably delivers pulse oximetry wherever spot-checking is needed, including EMS, physicians' offices, outpatient clinics and hospitals. In fact, its ergonomic design, easy-to-read display, and proven ability to accurately indicate SpO2 and pulse rate for patients from neonate to adult have helped make BCI® hand-held monitors a global leader in hand-held pulse oximetry technology. Product Features: Rugged, ergonomic design. Bright LED display. Two-button operation. Powered by 3 C-cell batteries. Can use all SMPM sensors. Product Benefits: Stands up to rough treatment in variety of environments. Easy to read in poor light. User friendly. Simple Interface. Long lasting power, portability. Unit can be used in numerous environments with neonate to adult patients. SI3301 BCI® 3301 Hand-Held Pulse Oximeter System SI3301MDD BCI® 3301 Hand-Held Pulse Oximeter System, MDD version