SR08 Smart Ring – Heart Rate, SpO2, Sleep & 5ATM Waterproof

SR08 Smart Ring — Your All-Day Wellness & Fitness Companion

Meet the SR08 Smart Ring, a sleek and lightweight wearable crafted from stainless steel that packs powerful health monitoring and gesture control features into a ring that weighs just 2.5g. Whether you're tracking your workouts, keeping an eye on your nightly rest, or simply want smarter control of your phone — the SR08 does it all from your finger.

Made in Mainland China.

Key Features

• Touch Display Screen — Intuitive gesture-tap interface lets you cycle through stats directly on the ring's built-in display, no phone needed.
• Heart Rate Monitoring — Triple-tap to activate the optical heart rate sensor (Tianyi 3918) for real-time readings right on your finger.
• Blood Oxygen Tracking (SpO2) — Four taps display your blood oxygen saturation level so you can stay informed during activity or rest.
• Sleep Monitoring — Five taps show last night's total sleep duration, helping you build better rest habits over time.
• Step & Activity Tracking — Counts steps, estimates distance, and calculates calories burned across multiple sport modes.
• 5ATM Waterproof — Rated to 50 metres depth, so you can wear it swimming, diving, or snorkelling without a second thought.
• Gesture Control — Wave to snap a photo or scroll through content on supported apps — hands-free convenience at its finest.
• Bluetooth Connectivity — Syncs wirelessly with Android 9.0+ and Apple iOS 10.0+ via the companion app (scan the QR code in the manual to download).
• 16–20 Day Standby / 3–4 Day Active Battery Life — 16mAh battery charges fully in about 2 hours (use a standard ≤1A charger — no fast/high-power chargers).
• CE & FCC Certified — Meets international safety and radio-frequency standards.
• Available in Black, Silver & Gold — Sizes 8 through 13 (18.2mm – 22.2mm inner diameter).

Size Guide

Quick Tap Guide

• 2 taps — Steps display
• 3 taps — Heart rate reading
• 4 taps — Blood oxygen (SpO2) reading
• 5 taps — Sleep duration
• 6 taps — Battery level
• Single tap / sync — Current time

Important Notes

1. Charge the ring fully upon first receipt — battery may be low after transit.
2. Health data is intended for general reference only; always consult a qualified medical professional for clinical health decisions.
3. Do not use a fast charger or high-power charger — use a standard ≤1A adapter only.
4. Scan the QR code in the included manual to download the companion app before first use.

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For more on wearable fitness trackers and how they can support an active lifestyle, visit the CDC Physical Activity resource hub.

Frequently Asked Questions

Q: Is the SR08 Smart Ring compatible with my iPhone or Android phone?

A: Yes — the SR08 Smart Ring connects via Bluetooth to any smartphone running Android 9.0 or higher, or Apple iOS 10.0 or higher. Simply scan the QR code in the manual to download the companion app and pair the ring.

Q: Can I wear the SR08 Smart Ring while swimming or showering?

A: Absolutely. The SR08 is rated 5ATM waterproof, meaning it can withstand water exposure up to 50 metres depth, making it suitable for swimming, showering, snorkelling, and light diving.

Q: How long does the battery last and how do I charge it?

A: Under normal active use the battery lasts 3–4 days; in standby mode it can last 16–20 days. A full charge takes approximately 2 hours. Always use a standard charger with an output of 1A or less — do not use fast or high-power chargers, as these can damage the battery.

Q: What sizes are available and how do I find my ring size?

A: The SR08 Smart Ring is available in sizes 8 through 13, with inner diameters ranging from 18.2mm (size 8) to 22.2mm (size 13). Use a ring sizer tool or measure the inner diameter of a ring that fits comfortably on your chosen finger to select the correct size.

Q: What health metrics does the SR08 Smart Ring track?

A: The SR08 tracks heart rate, blood oxygen saturation (SpO2), sleep duration, step count, estimated distance, and calories burned. It also supports multiple sport modes for a more tailored activity-tracking experience. Note that all readings are for general wellness reference and are not intended as medical diagnostics.