Color Options
Three finishes, same advanced sensor
Black
Silver
Gold
Key health metrics, 24/7
ST LIS2DW12 accelerometer + optical PPG sensor tracks heart rate and heart rate variability around the clock. Detect irregularities before they become emergencies.
Tracks deep sleep, light sleep, REM, and blood oxygen levels throughout the night. Understand which residents need overnight check prioritization.
Wear in the shower, pool, or during hand washing. No need to remove — compliance stays near 100% because residents forget it's there.
20.5mAh battery with wireless charging. Full charge in about 2 hours. 47-day standby — low-maintenance enough for facility deployment at scale.
OEM/ODM — make it your own
Materials
Titanium alloy · Ceramic · Stainless steel
Surface Finishes
Polished · Matte (sandblast) · Brushed
Colors & Branding
Black · Gold · Silver · Custom colors available
Full customization available — your material, finish, color, and packaging. Contact us with your requirements.
Designed for real care environments
Specifications
Technical details
| Model | K3 |
| Material | 14K gold-plated, 2.9mm thickness |
| Sensors | ST LIS2DW12 accelerometer + optical PPG (3918) |
| Health Metrics | HR · HRV · SpO2 · Temp · Sleep · Steps · Calories |
| Battery | 24mAH · 10–15 days use · 47 days standby |
| Charging | Wireless charging case included · ~2h full charge |
| Water Resistance | 5 ATM |
| Connectivity | Bluetooth 5.1 · GPS |
| App Support | iOS 10.0+ · Android 5.0+ · OTA updates |
| Sizes | US 6–13 (8 sizes, inner dia. 16.5–22.3mm) |
| Package | 8×8×4.3 cm · 73 g · Box + charging case + cable + bubble wrap |
| Colors | Black · Silver · Gold |
| OEM | Private label & custom packaging available |
Ring size guide
| US Size | Inner Dia. | Circumference |
|---|---|---|
| 6 | 16.5mm | 51.8mm |
| 7 | 17.4mm | 54.7mm |
| 8 | 18.2mm | 57.2mm |
| 9 | 19.0mm | 59.7mm |
| 10 | 19.9mm | 62.5mm |
| 11 | 20.7mm | 65.0mm |
| 12 | 21.5mm | 67.5mm |
| 13 | 22.3mm | 70.1mm |
Why source this ring through us
Smart device specialist
The manufacturer focuses on wearable health devices — not a general electronics trading company. 3-year track record with 63% repeat buyers.
What you see is what you get
Every specification on this page comes from the factory listing and the K3 product datasheet. 100% on-time shipment, 100% positive feedback.
Direct from our production line
Your order goes directly to our production team — no middlemen, no delays, no lost-in-translation.