1. What is the case size & material of the ET458?
Size:
Case diameter: 46mm
Strap length: 260mm
Case thickness: 9mm
Material:
Alloy case
Medical-grade stainless steel electrode
Silicone
1.56 inch AMOLED screen
2. What type of watch is the NORTH EDGE ET458?
The ET458 is a high-end health smart watch featuring ECG micro-physical examination, emotional stress monitoring, and an ultra-bright flashlight. It combines professional health monitoring — ECG detection, one-touch micro-physical examination, heart rate and blood oxygen monitoring — with everyday convenience like Bluetooth calling, multiple exercise modes, NFC access control, Alipay payment, and a flashlight.
3. What about the display?
The ET458 features a 1.56 inch AMOLED high-definition screen with a 480×480 Super Retina-level resolution. It delivers a visual feast with impeccable detail — every texture on the watch face and every digit in health monitoring data are sharp and clear. Color accuracy: ΔE<2, covering 99.5% Adobe RGB.
4. What about the ECG function?
Equipped with the 500HZ Goodix 3228 ECG chip, the ET458 forms a bio-electrical acquisition circuit through side electrodes and a back sensor. It accurately captures the weak bioelectrical signals generated by cardiac electrical activity, converts them into visual ECG waveforms, and completely presents key waveband data such as P waves, QRS waves, and T waves. The watch screen shows the ECG detection interface with heart rate and myocarditis risk assessment (No/Low Risk).
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
5. What about the AI-powered ECG report?
Leveraging AI algorithms and professional medical models, the system automatically analyzes ECG data to identify common cardiac abnormalities such as sinus rhythm and atrial fibrillation. Test results generate professional reports in real time, intuitively displaying metrics like heart rate variability (HRV) and myocardial electrical activity status.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
6. What about HRV monitoring?
The watch's HRV (Heart Rate Variability) monitoring function requires no complicated operations. The watch automatically analyzes data and generates visual charts (including the Lorentz Plot) to intuitively display physical stress, fatigue levels, and recovery status.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
7. What about the one-touch micro-physical examination?
No need for individual settings — simply tap the watch to launch the micro-physical examination function. In just 30 seconds, it simultaneously detects 5 core health indicators: heart rate, blood oxygen, blood pressure, stress level, and body temperature.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
8. What about heart rate monitoring?
Equipped with high-precision sensors, the smart watch continuously tracks heart rate data in all scenarios — resting, exercising, and sleeping. Advanced algorithms effectively filter out interference, ensuring accurate and reliable data. Monitoring results are presented in intuitive charts, with instant vibration alerts for abnormal heart rates.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
9. What about blood oxygen monitoring?
Using professional optical sensing technology, the ET458 quickly and accurately measures blood oxygen saturation (SpO₂). Whether during daily work, exercise, or sleep, it provides continuous monitoring around the clock.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
10. What about blood pressure monitoring?
Track blood pressure daily to stay on top of your health. The APP shows blood pressure data with a blood pressure level distribution chart (Severe/Moderate/Mild/Elevated/Normal).
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
11. What about blood glucose monitoring?
Get quick glucose readings without needles — the ET458 provides non-invasive blood glucose monitoring with reference ranges for fasting/before meal, 1 hour after meal, and 2 hours after meal.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
12. What about blood component testing?
The ET458 monitors uric acid and blood lipid levels
in real time, helping you stay on top of your body's condition.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
*13. What about body composition measurement?
With just a light touch, it quickly analyzes body composition data such as body fat percentage, muscle mass, and water ratio, and calculates BMI values — scientifically manage your BMI.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
14. What about sleep monitoring?
The smart watch serves as your 24-hour sleep steward, tracking sleep stages from falling asleep to waking up — light sleep, deep sleep, and REM (Rapid Eye Movement) phase. With AI-powered sleep algorithms, it deeply analyzes sleep architecture, generates visual sleep reports, and clearly presents core metrics like total sleep time and sleep efficiency.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
15. What about emotion and fatigue detection?
The smart watch acts as your companion, transforming complex emotions into adorable emojis (Excited/Elevated/Stable) and quantifying fatigue with data (Mild/Moderate fatigue). A quick glance at your wrist tells you how your body and mind are feeling, plus you get personalized health recommendations tailored to your status.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
16. What other health functions does the ET458 have?
Sedentary Reminder: vibration alerts prompt you to move, helping build healthy exercise habits.
Women's Health: track menstrual cycles, ovulation periods, and more for thoughtful care.
Breath Training: relieve stress and relax anywhere to regulate emotional state.
MET Function: real-time calculation of exercise intensity to quantify calorie burn and cardio load.
*This product is not a medical device. The health data provided are for reference only and shall not be used as a basis for diagnosis or treatment.
17. Does the ET458 support Bluetooth calls?
Yes. With one-touch Bluetooth connectivity, the ET458 enables hands-free calls on your wrist — answer calls with a raise of your hand when they come in; make calls, hang up, and access call logs and contacts with simple taps.
18. What about wrist information reminders?
The smart watch syncs in real time with your phone, instantly delivering messages from WeChat, SMS, emails, and more. No need to check your phone repeatedly — gentle wrist vibrations keep you informed.
19. Does the ET458 support Alipay payment and NFC?
Yes. With Alipay payment, no phone is needed — make offline payments with a raise of your wrist for effortless checkout. With a built-in NFC chip, simply tap your smart watch against the access control sensor to unlock doors quickly — smart and convenient.
20. What about the flashlight?
The ET458 features an ultra-bright flashlight with four modes: Warning Mode (high-frequency flashing strong light to attract attention in emergencies), Steady-On Mode (stable illumination for night searching or map checking), SOS Mode (internationally recognized distress signals via alternating light and dark flashes), and Night Running Mode (soft light with a dynamic breathing light). Long range, high brightness, long battery life.
21. What other apps are available?
The ET458 offers a variety of lifestyle apps: weather forecast, music control, smart voice assistant, and shake-to-take-photo — explore more apps to discover.
22. What about the sports modes?
The watch covers over 100 sports modes, including running, cycling, fitness, skiing, and more — switch with one tap to start professional monitoring. Equipped with high-precision sensors and AI algorithms, it tracks core data in real time, such as sporting trajectory, pace, heart rate, and calorie burn.
23. What about the battery and charging?
With a large 380mAh battery, the ET458 delivers robust power. In daily use mode — with message alerts, health monitoring, and sports tracking fully enabled — it lasts 4–7 days. In ultra-long standby mode, the battery life easily exceeds 20+ days. It supports magnetic charging with short-circuit protection. (Note: after enabling the always-on display (AOD) function, the battery life will be shortened to 2 days. Battery life data is from the company's laboratory and may vary with actual use.)
24. Is the ET458 waterproof?
Yes. With an IP68 professional waterproof rating, the smart watch resists dust intrusion and easily handles daily splashes, sudden rain, and even submersion — washing hands, getting caught in the rain, swimming, or high-intensity workouts with heavy sweating, the watch operates stably with all functions intact. Note: it is not suitable for diving, hot water showers, hot springs, saunas, or deep water activities under high-speed water flow. Leather and metal straps are not suitable for swimming and heavy-sweat sports. After seawater use, rinse gently with clean water and dry. The dustproof and waterproof function is not permanently effective and may decrease with daily wear.
25. Which systems and languages are supported?
Compatible systems: Android 8.0 or above / iOS 13.0 or above.
Phone languages: Chinese, English, Japanese, German, French, Italian, Portuguese, Spanish, Russian, Polish.
APP languages: Danish, Ukrainian, Urdu, Russian, Croatian, Hungarian, Norwegian, Hindi, Indonesian, Turkish, Bengali, Hebrew, Greek, German, Italian, Czech, Slovak, Japanese, French, Polish, Persian, Thai, Swedish, Lithuanian, Simplified Chinese, Traditional Chinese, Romanian, Finnish, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean, Malay.
26. What is included in the package?
The package typically includes:
NORTH EDGE ET458 Watch
Charging cable
User Manual
Original Gift Box
Warranty Card (Scan the provided QR code to follow our social media, or visit our official website and click "After-Sales Service" to register your warranty information.)
27. How can I contact NORTH EDGE Customer Support?
Email: info@northedgewatches.com
You can also start a chat by clicking the "CHAT" icon on the (https://northedgewatches.com) website.
