The ring sensor is worn like a ring and can be placed on any finger. Choose a finger that allows the sensor to be secure, but not too loose or too tight. For most patients, the thumb works best.

If it feels comfortable, we recommend using a different hand and/or finger for each night of testing.

If needed, the sensor can be secured with a Band-Aid® or medical tape on the back of the hand, or at the base of the finger.