Scroll to top
©2021-2022 Belun Technology

Last updated: Dec 8, 2021

Choose the correct Ring Arm

  • Using a correct ring arm that fits you is essential to get a sound sleep analysis
  • Left and right index fingers may be of different sizes that fit different ring arms
  • Try on a smaller ring arm first if available
  • A ring with a correct ring arm should be snug on your finger

Watch the instruction video:

1. Measure the circumference of the index finger with the finger ruler

2. Choose the Ring Arm with the size indicated by the finger ruler