Willnice Wrist Pulse Oximeter Fingertip, Smart Sleep Oxygen Monitor for O2 and Heart Rate 30 Hour Continuous Tracking with Finger Sensor, Long-Lasting, Sports Use Only - GY Deco

• SLEEP OXYGEN MONITOR: Continuously records oxygen level and heart rate throughout the night, enabling real-time recording throughout the night. SMART NOTIFICATION: You can customize your oxygen and heart rate range values according to your situation. It will notice you via sound or stimulate you to wake up gently if the data exceeds your defined level. USER-FRIENDLY: Use the base station to store your data, only offline storage, we always protect your data security. EASY TO USE: Use the base station to connect with the device, which is convenient for users who are not good at using electronic devices and poor network. Improved design of knob encoder, convenient for users to operate and set the base station. 30 HOURS OF LONG-TERM USE: 30 hours of continuous use after one charge is enough to meet your daily use and just for sports or aviation use only not for medical use.