NatureSpirit Wearable Wrist Pulse Oximeter: * Very compact design and lightweight, fits comfortably on wrist * Measures SPO2 and Pulse Rate accurately, can be used for continuous monitoring for sleep study * 256k Color OLED display, in two directions with four levels of brightness adjustment * SPO2, Pulse Rate, Pulse Rate waveform and bar graph display * Easy to use setup menu * Can set pulse sound, measurement audio alarm for SpO2 and pulse rate * Can set year, date and clock * Low battery low indication * Low power consumption * Internal flash memory to store up to 24 hours" data * USB connection to up load data to PC to send to physician * Includes comprehensive display and data management software * Optional wireless connectivity kit * Model# CMS-50F Specifications:* Measurement range: SPO2: 35^99 - Pulse Ratio: 30-250BPM * Resolution: 1% for SPO2, 1BPM for pulse rate * Accuracy: ±2% (70^99), unspecified (<70%) for SPO2; ±2BPM or±2% (whichever is greater) for pulse rate * Power supply: 3.7V Lithium rechargeable battery