Generic BJ02 Smart Ring: Accurate sleep monitoring
Meet the Smart Ring—your new 24/7 health guru that doesn't charge by the hour. Whether you're a fitness fanatic or just trying to remember where you left your phone, this little gadget's got your back (and your wrist). It's like having a sleep scientist, personal trainer, and lifeguard all rolled into one sleek piece of tech. From tracking how well you snooze to keeping an eye on your heart rate and blood oxygen levels, it's all about giving you the dirt on your health so you can sleep smarter, not harder.
And when you're awake? This ring doesn't slack. It counts every step, calorie, and minute of exercise, whether you're running, cycling, or pretending to swim (we won't judge). With a battery that lasts up to 5 days—or a whopping 60 if you use the charging case—it's like the Energizer Bunny of health trackers. Plus, it's 10ATM waterproof, so go ahead, take it for a swim or wash your hands like you're in a public service announcement. Made from tough epoxy resin and stainless steel, it's built to last and comfy enough to forget you're wearing it.
Oh, and for the pièce de résistance: Air Gestures. Wave your hand like a magician to scroll through your feed or snap a pic from afar—no touching required. And the best part? No sneaky subscription fees lurking in the fine print. Just pure, unadulterated tech magic.
Features
- Activity tracking with multiple sport modes
- Long-lasting battery life
- 10ATM waterproof
- Air gestures feature
- Accurate sleep monitoring
General specs
- Brand: Generic
- Model: BJ02
- Seller: Amazon
- ID: B0FBJT25RZ
- package_dimensions: 0.1 x 0.1 x 0.1 inches
- item_weight: 0.004 ounces
- batteries: 1 9V batteries required. (included)
- date_first_available: May 31, 2025
- country_of_origin: China
- standing_screen_display_size: 0.1 Inches
- memory_storage_capacity: 80 MB
- First listed by seller: 7/17/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
Shipping options
United States
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Generic BJ02 Accurate sleep monitoring
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DustAway SR03 Comprehensive Health Monitoring
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Smart Ring with Sleep Monitoring Diverse health monitoring modes
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Smart Ring Health Tracker Comprehensive real-time health monitoring
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Smart Ring Fitness tracking
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| Brand | Generic | DustAway | SARUNN ER | Generic | HitTopss | Aichiken |
| Model | BJ02 | SR03 | ||||
| Color | ||||||
| Rating |
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| Price | $27.99 | $39.99 | $22.80 | $29.99 | $29.99 | $65.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | December 6, 2025 | December 6, 2025 | December 6, 2025 | December 6, 2025 | December 6, 2025 | December 6, 2025 |
| package_dimensions | 0.1 x 0.1 x 0.1 inches | 3.15 x 3.15 x 1.18 inches | 3.62 x 3.62 x 1.22 inches | 3.07 x 2.91 x 1.73 inches | 3 x 3 x 1 inches | |
| item_weight | 0.004 ounces | 3 Grams | 3.2 ounces | 2.89 ounces | 2.39 ounces | |
| batteries | 1 9V batteries required. (included) | 1 Nonstandard Battery batteries required. (included) | 1 A batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 Lithium Ion batteries required. (included) | |
| date_first_available | May 31, 2025 | April 21, 2025 | December 25, 2024 | April 2, 2025 | ||
| country_of_origin | China | China | China | China | ||
| standing_screen_display_size | 0.1 Inches | 0.1 Inches | 1 Centimeters | |||
| memory_storage_capacity | 80 MB | 0.12 MB | 64 MB | 4 MB | ||