E420 H Band Smart Watch for Health Monitoring
E420 H Band Smart Watch for Health Monitoring
Product Overview
The E420 Smart Watch is a wearable health-tracker designed for comprehensive vital-sign monitoring, fitness tracking and daily smart-watch functionality. It pairs with the H Band companion app and supports both Android (≥ 5.0) and iOS (≥ 9.0). tvcmall+2UniqueBud+2 Its core value proposition is to offer real-time monitoring of heart-rate (HR), blood pressure (BP), blood oxygen (SpO₂) and even ECG (electro-cardiogram) and non-invasive glucose levels (though see caveats below). oemsmartwatch.com+2UniqueBud+2
Key Technical Specifications
Here are the main hardware and performance specs of the E420:
Display: 1.39-inch TFT/IPS full touch screen, resolution 360×360 pixels. tvcmall+1
Processor / Chipset & Sensors:
Main low-power chip: GR5515. Shenzhen Shengye Technology Co.,Ltd+1
PPG sensor chip: SFH2201. tvcmall+1
Blood oxygen front-end: GH3220 RF analog + SFH2201. tvcmall+1
G-Sensor (accelerometer): Rohm KXTJ3-1057. Shenzhen Shengye Technology Co.,Ltd+1
Connectivity: Bluetooth 5.1 compatible (some listings show BLE 5.3). oemsmartwatch.com+1
Battery: 280 mAh capacity. Standby up to ~30 days, typical daily usage ~4-7 days. tvcmall+1
Housing/materials: Zinc alloy case + ABS/PC-ABS back; strap options in TPU, leather, steel-link. staranb.en.made-in-china.com+1
Waterproof / dustproof: Rating IP68 (suitable for daily rain, hand-washing, cold-water exposure). tvcmall+1
Health & Fitness Monitoring Features
The E420 offers an extensive suite of health-monitoring features. Below are the highlights:
Heart Rate (HR) Monitoring – continuous measurement via optical PPG green-light sensors.
Blood Pressure (BP) Monitoring – claims one-click measurement on the wrist. tvcmall
Blood Oxygen (SpO₂) Monitoring – includes dedicated sensor front-end. Shenzhen Shengye Technology Co.,Ltd
ECG (Electro-Cardiogram) Monitoring – high-frequency (512 Hz) ECG support is cited in some product descriptions. UniqueBud+1
Non-invasive Blood Glucose Monitoring – some listings reference this (“blood sugar”, “non-invasive blood glucose”) but again see caveats. tvcmall+1
Sleep Monitoring – tracks sleep duration/quality.
Activity Tracking / Sports Modes – step count, distance, mileage, calorie-consumption, multiple sports mode options. TIKTOKDADDY
Additional Wellness Reminders – sedentary reminders, drink-water reminders, silent-alarm, remote camera & music control, message/call reminders. tvcmall+1
Design & Usability Notes
The large 1.39″ high-resolution display provides a good real-estate for dial/custom screens and making health-readouts readable in outdoor conditions.
The IP68 rating allows everyday wear including light water exposure (though not necessarily deep-water swimming or prolonged submersion).
The available battery life (4-7 days typical) is competitive in the budget to mid-smartwatch segment, though heavy usage (frequent ECG/BP scans + always-on display) will reduce that.
Companion App Support: The H Band app supports multiple languages. tvcmall
Strap & finish options: The device appears to offer options in silicone/TPU, leather, or steel strap, allowing a more “professional” appearance if desired (e.g., leather or steel strap variant).
Professional Use Considerations & Caveats
Given the health-monitoring claims, here are important professional remarks for evaluating suitability:
Not a Medical Device: While the E420 lists ECG, BP and even blood-glucose detection, this does not replace clinical medical equipment or diagnostic tools. Wearable sensors may have limited accuracy or calibration compared to lab equipment.
Blood Glucose & ECG Claims: The blood glucose monitoring feature is presented with marketing language (“non-invasive blood glucose”) but lacks robust independent verification. In community forums, users of similar low-cost devices frequently note inaccuracy or inconsistency. Reddit+1<