Features 1、NEWLY UPGRADED - Measures quickly and precise pulse rate and SpO2 blood oxygen saturation of arterial hemoglobin levels. 2、PRECISE AND RELIABLE - Quickly determine your SpO2 (blood oxygen saturation levels), Fast SpO2 readings, pulse measurements and display it conveniently on a large digital OLED display. 3、BRIGHT & COMPACT - Light Weight, Easy to carry & Accommodates wide range of finger sizes. Bright OLED display shows real time Pulse Rate, Pulse Rate Bar and SpO2 level. 4、LIGHT, COMPACT & LONG BATTERY LIFE- Light and compact, accommodates wide range of finger sizes, long battery life, automatic power off after 10 seconds. 5、You Get: Fingertip Pulse Oximeter, Neck/Wrist Cord, User Manual, 2-AAA Batteries, plus our no-hassle 1 year warranty and friendly customer service. Specification Sleep monitoring storage memory function: (1) Recording form: the sleep record is recorded as a waveform function; (2) Recording time: waveform data of up to 8 hours can be recorded; (3) Storage method: It is stored in a memory manner, which is convenient for users to check the data by themselves; (4) Data use: The data can be provided to a professional doctor for effective sleep disorder treatment; (5) Operation mode: In the Page 3 operation setting, the battery will flash ERC continuously, indicating that the sleep recording function has been successfully opened; (6) Note: If testing the sleep monitoring function, at least three minutes or more; (7) Data embodiment: wave mode, data mode; Product features: SpO2 range: 36% - 100% SpO2 accuracy: 2% SpO2 resolution: 1% PR range: 30 - 250 bpm PR accuracy: 1 bpm PR resolution: 1 bpm PI range: 0.2%-30% PI accuracy: ±0.1% PI resolution: 1% Screen: OLED screen; Packing size: 6.5*3*3cm; Screen material: OLED display; Product list: oximeter*1 manual*1 hand strap*1