Smart Fitness Bracelet
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Smart Fitness Bracelet E400.
Tracks heart rate, blood pressure, and blood oxygen (SpO2) continuously from your wrist — giving you a meaningful, real-time picture of your health throughout the day, not just during workouts. Full touch screen, magnetic charging, and up to 7 days of battery life. Available in Brown Leather, Black Leather, Red Silicone, Blue Silicone, and Vinyl.
Continuous tracking of heart rate, blood pressure, and blood oxygen simultaneously — data that used to require separate devices or a clinic visit, now available at a glance throughout the day. All three running passively, without any action required. Monitored trends over time are more valuable than individual readings, and the E400 builds that picture automatically.
Navigating health data, notifications, and settings is straightforward without fiddly buttons or a display too small to read in daylight. For a device worn all day and checked regularly, the display is the interaction point that matters most — a large, responsive touch screen removes the friction from every check.
Up to 7 days means the bracelet charges once a week rather than every night — removing the habit friction that causes many fitness trackers to spend long stretches in a drawer. A wearable that lasts a week simply stays on, which means it actually collects the continuous data it is designed to provide. The battery life that makes the health tracking meaningful rather than intermittent.
Leather straps (Brown and Black) suit office and everyday wear where the bracelet needs to read as an accessory rather than a sports device. Silicone straps (Red and Blue) are better for workouts and active use where moisture resistance and grip matter. Vinyl is a lightweight, durable alternative for all-day comfort. Choose the strap that fits how and where you will actually wear it.
- Brown Leather and Black Leather straps suit office and everyday wear where the bracelet needs to read as a considered accessory — they pair naturally with business and smart-casual outfits and are less visually prominent than silicone in formal contexts.
- Red Silicone and Blue Silicone are better for active use, gym sessions, and outdoor activity — moisture-resistant, easy to clean, and more comfortable during sustained physical exertion. The colour options add a visible personal accent.
- Vinyl is a lightweight, durable alternative that sits between leather and silicone in character — practical for all-day wear, easy to clean, and comfortable without the formality of leather.
- For gifting without knowing the recipient’s preference, Black Leather is the most versatile choice — it reads as neutral and refined across the widest range of personal styles and outfit types.
- Straps are interchangeable — if you want the flexibility to switch between a leather strap for work and a silicone strap for exercise, you can purchase additional strap styles separately.
- Heart rate (HR) is measured in beats per minute — a resting rate of 60–100 bpm is typical for adults, with lower values generally indicating better cardiovascular fitness. Monitoring trends over time is more useful than individual readings.
- Blood pressure (BP) is displayed as systolic over diastolic pressure — the E400 provides indicative readings for general awareness. For clinical accuracy or medical use, consult a healthcare professional using a medically validated device.
- Blood oxygen (SpO2) measures the percentage of haemoglobin carrying oxygen — a healthy reading is typically 95–100%. Readings consistently below 95% may warrant medical attention. SpO2 is particularly relevant during sleep and at altitude.
- All three metrics are tracked continuously and passively — no action is needed to initiate a reading during normal wear. Data is stored on the device and can be reviewed through the companion app.
- The E400 is a consumer wellness device and not a medical device — readings are indicative and suitable for personal health awareness, not clinical diagnosis or treatment decisions.
- The magnetic charging cable attaches to the back of the bracelet — align the connector with the charging contacts and it snaps into place. No port to align, no cover to remove.
- A full charge typically takes 1–2 hours — charging to full rather than topping up frequently gives the most accurate battery level readings over time.
- Up to 7 days is achievable with moderate use — continuous health tracking, frequent display use, and active Bluetooth syncing will reduce battery life. Reduce display brightness and sync frequency for maximum life.
- Avoid charging in direct sunlight or very hot conditions — lithium batteries charge and perform best at room temperature. Prolonged heat exposure during charging degrades battery capacity over time.
- If the battery drops to zero and the bracelet powers off, charge for at least 15 minutes before attempting to power it on again.
- Download the companion app and pair the E400 via Bluetooth before first use — the app is where you review historical health data, set personal goals, configure notifications, and update firmware.
- Wear the bracelet on the non-dominant wrist for more accurate readings during daily activity — the sensor stays better positioned when the wrist is less active, improving the consistency of heart rate and SpO2 measurements.
- Ensure the bracelet sits snugly against the skin but not tightly — a strap too loose will allow the sensor to move and produce inconsistent readings; one too tight will be uncomfortable for all-day wear and may affect circulation.
- For blood pressure and SpO2 readings, remain still for a few seconds while the measurement is taken — movement during a reading can reduce accuracy.
- Sync the bracelet with the app at least once daily to back up health data and ensure the device clock stays accurate — unsynced data older than the device’s storage capacity may be overwritten.
“Continuous health tracking, 7-day battery, full touch screen — the bracelet that stays on your wrist because it earns its place there.”



