【Accurate Sensing】Utilizes advanced sensor technology to precisely measure O2 level and pulse rate. Delivers accurate and real-time readings continuously, enabling users to stay informed about their body with confidence. 【Extended Battery Life】Requires only 2 hours to fully charge and continuous usage for up to 100 hours. Easy charging with magnetic charging cable. 【Smart Reminder】Activates audible or vibrating reminder when O2 levels or PR fall below set thresholds. The thresholds can be adjusted both on the pulse ox itself and the App. 【Bluetooth Sync】Equipped with Bluetooth for seamless connection to the Vihealth APP. Allows real-time data viewing, the full readings with O2 and more data could be reviewed with graphic trends once a measurement finished. 【Sufficient Data Storage】Boasts built-in storage to hold 4 sets of 12-hour data. Never loose evey second readings even without a constant APP connection. 【Comfortable Wear】Ergonomically designed to fit wrists and fingers comfortably. Lightweight and non-intrusive, facilitating long-term use during daily activities. NOTE: It's not a medical device. This device is for Sports and Aviation use only and not intended for medical use. NOTE: It's not a medical device. This device is for Sports and Aviation use only and not intended for medical use.