COLMI RING 2 Smart Ring, Size 10, Black – 24/7 Health & Fitness Tracker with Heart Rate, SpO2, Sleep & Stress Monitoring, IP68 Waterproof, 7-Day Battery

Unlike bulky wristbands or smartwatches, the COLMI RING 2 condenses advanced health tracking into a sleek, lightweight ring that disappears on your finger. Size 10 in black pairs a discreet stainless steel shell with a smooth epoxy resin interior, so you can monitor your body around the clock without ever feeling weighed down.

Highlights

• Continuous heart rate, blood oxygen (SpO2), and skin temperature tracking
• Detailed sleep analysis: deep, light, REM, and awake stages
• Stress monitoring with guided breathing support in the COLMI Fit app
• IP68 water resistance – safe for handwashing, rain, and shallow water
• Up to 7 days of battery life on a single charge
• Bluetooth 5.1 with Realtek 8762DW chipset for reliable syncing

In daily use

The RING 2 works quietly in the background. It counts steps, calculates distance and calories burned, and logs active minutes. At night, it captures sleep quality and overnight SpO2 trends. A gentle vibration can wake you with a silent alarm, and the find-my-phone function helps locate a misplaced handset. The magnetic charging base tops up the 20 mAh battery in about 1–2 hours.

Full specifications

• Model: COLMI RING 2
• Colour: Black
• Ring size: US 10 (inner diameter 19.8 mm, circumference 62.1 mm)
• Material: Stainless steel housing, epoxy resin inner
• Sensors: Heart rate, SpO2, skin temperature, 3-axis accelerometer
• Connectivity: Bluetooth 5.1 (Realtek 8762DW)
• Battery: 20 mAh, up to 7 days typical use
• Charging: Magnetic, approx. 1–2 hours
• Water resistance: IP68
• Compatibility: Android 5.0+ / iOS 9.0+
• App: COLMI Fit
• Display: None (no screen)

Final note

The COLMI RING 2 is for anyone who wants comprehensive health insights without the bulk of a watch. It is not a medical device, but a practical daily companion that helps you understand your body's rhythms.