16Double8 ZL54CJ Smart Watch with Bluetooth: Heart rate monitoring
What does a smartwatch need to do to earn its keep on your wrist? The ZL54CJ aims to answer that with a blend of health smarts and everyday utility. It pairs effortlessly over Bluetooth, piping notifications for calls, texts, and apps straight to your wrist—no more frantic phone-digging during meetings or workouts. For the health-conscious, it's a mini clinic on a strap, tracking heart rate, blood pressure, and blood oxygen levels in real-time. Think of it as your personal wellness dashboard, always on duty.
But it's not all serious business. Cue up your playlist and control the music directly from the watch—perfect for keeping the beats rolling without breaking stride on a run or ride. With multi-sport modes covering everything from cycling to swimming, it's like having a coach that never complains. The interface? Smooth and intuitive. Battery life? Long enough to forget the charger for days. Whether you're crushing it at the gym, grinding at the desk, or just out and about, this gadget slots right into the rhythm of your life.
- Blood pressure tracking
- Oxygen saturation monitoring
- Bluetooth music control
- Message notifications
- Multi-sport tracking
- Heart rate monitoring
General specs
- Brand: 16Double8
- Model: ZL54CJ
- Seller: Joom
- Connectivity: Bluetooth
- Sensors: Heart rate monitor, Blood pressure sensor, Oxygen saturation sensor
- Functions: Music control, Message notifications, Multi-sport tracking
- Compatibility: Smartphones with Bluetooth
- First listed by seller: 8/25/25
If you are interested in more details, you can find full information on the seller's page.
Shipping options
United States
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16Double8 ZL54CJ Heart rate monitoring
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16Double8 MK66 2023 Full touch screen display
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| Brand | 16Double8 | Mindrose | 16Double8 | YHE | TYKOIT | |
| Model | ZL54CJ | MK66 2023 | 8ad4cf31-6e1f-441d-b140-b3098063bd12 | |||
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| Price | $29.73 | $17.89 | $34.19 | $12.17 | $99.99 | $21.99 |
| Seller | Joom | Sunsky | Amazon | Joom | Amazon | Amazon |
| Update | August 24, 2025 | August 16, 2025 | July 18, 2025 | August 24, 2025 | June 27, 2025 | June 27, 2025 |
| Compatibility | Smartphones with Bluetooth | Android 4.4 / iOS 8.4 or above | Android 6.0 / iOS 11.0 or above, Bluetooth 4.0 or above | |||
| Display | 2.01 inch TFT square screen | 1.47" HD color, full touch screen | 1.78 inch AMOLED touchscreen | |||
| Battery Life | 7 days heavy use, 10 days daily use, 30 days standby | Up to 7 days | 7 days continuous use, 30 days standby | |||
