Unverified50% confidenceFactExact time
PPG sensors in smart rings use a reflective rather than transmissive design, with the LED and photodetector located on the same side.
1
Sources
50%
Confidence
Long-term
Relevance
9/6/2026
First Seen
Sources
Related Entities
Cite This Claim
Stable URI
https://kongchang.com/claim/864850API
curl https://kongchang.com/api/v1/knowledge/claims/864850MCP
get_claim(id=864850)