RENPHO Lynx Smart Ring-All Day Sleep & Activity Tracking, Includes Charging Case

Product description

Size Before You Buy

1 Sleep Analysis

2 Women Health

3 Activity Monitoring

4 Stress Index

5 Heart Rate Monitoring

How tight should a ring be?

Secure but not restrictive. It should slide smoothly over your knuckle with a bit of resistance, neither too tight nor too loose. Test the fit by making a fist. If you see a gap between your finger and the ring, you may try a smaller size.

What finger or hand does a ring go on?

For the best accuracy, it is recommended to wear it on the index finger of your nondominant hand. If you prefer another finger, the middle or ring fingers are preferable.

Stuck between sizes?

We recommend choosing the smaller size as it provides a snug fit that will enhance accuracy.

How does LYNX track sleep?

A green light sensor in LYNX monitors heart rate and identifies sleep states across four zones, while an accelerometer detects disturbances in sleep quality.

What do LYNX’s infrared sensors do?

The IR sensors measure oxygen saturation levels in your blood; they indicate how well your circulatory system is working.

Get the Perfect Fit: The RENPHO LYNX Smart Ring uses unique sizing —different from standard jewelry rings or other brands.To ensure accuracy, always purchasing and measure your size with the official RENPHO Sizing Kit before buying LYNX Smart Ring.
Comprehensive Insights: Monitor your sleep, blood oxygen levels, stress, heart rate, steps, distance, and calories burned. The RENPHO LYNX Smart Ring can also track fitness activities such as walking and running, gaining detailed insights to support your fitness goals.
No Subscription Fees: Seamlessly connect the RENPHO LYNX Smart Ring with the Renpho Health App—no subscription fees required. Compatible with both iOS and Android, the App syncs with Apple Health and Google Health Connect.
Convenient Charging: The RENPHO LYNX Smart Ring boasts a 7-day battery life and includes a charging case for an extra charge and safe storage while out, eliminating the risk of loss. Ideal for long-term travel or business trips, ensuring your ring is always powered and ready for your adventures.
All-Day Wear: 5ATM Waterproof and designed with titanium exterior for 24/7 wear, the RENPHO LYNX Smart Ring endures activities like swimming and hiking, making it a reliable companion for tracking your health and fitness data come rain or shine.
Precision Tracking at Your Fingertip: Empowered by a sophisticated chip and sensor, the RENPHO LYNX Smart Ring is meticulously designed to offer precision and reliability in data tracking and serves as your personal health consultant anytime, anywhere.
HSA/FSA Eligible: The RENPHO LYNX Smart Ring is eligible for purchase with most Flexible Spending Accounts (FSA) and Health Savings Accounts (HSA).
Wearing Guide: To ensure the most accurate measurements, please make sure the orientation indicator is facing towards your palm. In addition, please remove the RENPHO LYNX Smart Ring before applying slippery substances to your hands to prevent it from falling off.

Price last updated Mar 11, 2026 03:22:16 UTC. Availability and price subject to change. More info