ZBNMY Smart Ring Fitness Tracker for Women & Men — Silver Size 8, 7-Day Battery, Heart Rate & Sleep Monitor

The ZBNMY Smart Ring is a compact, subscription-free wearable that tracks heart rate, sleep stages, activity and SpO2 while delivering up to seven days of battery life in a waterproof silver ring.

Designed for people who want continuous health and activity insights without a bulky wrist device or monthly fees, this slim smart ring pairs with Android and iOS via a free app. It captures 24/7 biometric trends (heart rate, blood oxygen, steps), logs detailed sleep phases, supports multiple sport modes, and ships with a portable charging case so you can recharge on the go.

How do I pick the right ring size before I buy?

Measure the outer circumference of the finger where you plan to wear the ring, following a string-or-tape method to get an accurate length. Pull the string slightly tighter or choose one size smaller to ensure a snug fit that won’t slip during activity.

• Measure the finger at the end of the day when it’s largest.
• Use the included size chart in product images to convert circumference to ring size.
• Prefer a slightly tighter fit to keep sensors in contact with skin.

What health and activity data does the ring record?

The ZBNMY ring continuously monitors heart rate and blood oxygen, tracks steps and distance, and detects different sleep stages including light, deep, and REM. Data syncs to the free app so you can view trends and export information for personal use.

• 24/7 heart rate and SpO2 monitoring for trend tracking.
• Step counting, calories burned, and distance estimation during activities.
• Automatic sleep staging with duration and wake detection.

How long does the battery last and what charging accessories are included?

• 1–2 hour charge time for the ring itself.
• 5–7 days typical battery life between charges.
• Portable charging case (500 mAh) for on-the-go recharging.

Is the ring water resistant for daily use and workouts?

The ZBNMY Smart Ring carries an IP68 waterproof rating, making it safe for handwashing, showers, and shallow swimming. Avoid exposing the ring to high-pressure water jets or extended deep-water activities to preserve seals and sensors.

• IP68 rating for everyday water resistance.
• Suitable for showers, handwashing, and light swimming.
• Not recommended for scuba diving or high-pressure water sports.

Who is this for: The ZBNMY Smart Ring is ideal for busy professionals, travelers, athletes and anyone who wants a discreet wearable that delivers continuous biometric and sleep insights without subscription costs. It suits people who prefer minimalist jewelry-style devices, need reliable on-the-go charging, and want to track activity and sleep in both daily life and light aquatic settings.