If the “Measure Now” function fails when you want to take a measurement at a specific moment, please check the following.

1. Minimize movement during measurement (most important): The PPG sensor in the smart ring measures subtle blood flow, so any finger or body movement during measurement distorts the signal and cancels the reading. Rest your hand comfortably on a flat table and stay still and quiet until the measurement completes.

2. Check sensor operation (LED): When measurement starts, check that the designated light inside the ring flashes properly (heart rate: green LED; blood oxygen: red LED). If the light doesn’t come on, you’ll need to check your Bluetooth connection or battery level.

3. Wear it snugly: When the sensor is in light, close contact with the inside of your finger, light loss is minimized and measurement is more accurate.