3 AA batteries required. (included)

ACCURATE, RELIABLE READING IN SECONDS – Manufactured according to CE, ISO 9001, and ISO 13485 professional standards; Pulse rate accurate to 2 bpm; SpO2 levels accurate to 3% between 70-100% saturation levels
EASY TO READ DISPLAY – Color LCD to display SpO2, Pulse Rate, and plethysmogram; Set high/low pulse rates and low oxygen levels at which alarm sounds; Audible from other room Log up to 384 hrs of data; No WiFi or smartphone required
INCLUDED – Handheld Oxygen Saturation Monitor; Adult finger spot checking sensor (not for overnight use; Overnight sensor available separately); Converter cable; Data cable; Stand; Carry case; 3 AA Batteries. NOT INCLUDED AC adapter; charging cable