Technical specifications
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Technical specifications
Body
| Dimensions (W × L × H) | 40.5 × 47 × 14.7 mm (1.6" × 1.9" × 0.6") |
| Weight | 52 g |
| Main CPU | nRF5340 — 2× ARM Cortex M33 cores (application + network) |
| Platform (OS) | Zephyr RTOS |
Display
| Type | LCD TFT |
| Size | 1.3" |
| Resolution | 240 × 240 px |
| Brightness | 250 NITS |
| Cover lens | Corning Gorilla Glass 3 |
| Surface hardness | >8 H |
| Display area | 547.56 sq mm |
Memory
| Capacity | 128 Mb |
Connectivity
| Bluetooth version | 5.3 |
| Remote access | Cloud |
| Operating frequency | 2402 – 2480 MHz |
| Max. output power | 3 dBm |
Features
| ECG sensors for electrocardiogram | PPG sensors for AFib detection |
| Heart rate monitoring (when inactive) | Low / High heart rate alerts |
| Cloud-based firmware updates, Bluetooth configuration | Water resistant: 1 m for 30 min — IP67 |
| SpO2: 70–100%; ±4% (excluding high motion artifacts and low perfusion cases) | |
Power supply
| Battery | Built-in Li-Po 410 mAh / 1.56 Wh (non-replaceable) |
| Charging voltage | 5 V ⎓ |
| Operating voltage | Internal: 3.8 V ⎓ · External: 5 V ⎓ |
| Max. input current | 0.5 A |
Sensors & components
| Accelerometer | Gyroscope |
Buttons
| Side button | Turn on, Restart, Back |
Straps
| Material | Silicone rubber with integrated stainless-steel electrode |
| Size S | Fits wrist 14–20 cm |
| Size M | Fits wrist 16.5–22 cm |
| Size L | Fits wrist 19–24.5 cm |
* Strap size depends on the purchased set.
Supported peripherals
| Accessory | TeltoHeart charging dock |
| Wall charger compatibility | Any CE-marked 5 V⎓/1A charger with USB Type-A connector |
| Cable compatibility | Any CE-certified USB-A to USB-C cable |
| Android | Android 10 or later with Google Play Services |
| iOS | iOS 14 or later |
| Bluetooth compatibility | Bluetooth v5.0+ in 2.4 GHz band with SMP protocol |
⚠ MRI (Magnetic Resonance Imaging) and CT (Computed Tomography) are medical imaging systems used for diagnostic imaging. Compatibility of this device with MRI or CT environments has not been evaluated. Use of this device in MRI or CT environments is prohibited.
Conditions for use
| Operating temperature | −10 to +45 °C |
| Charging temperature | 0 to +45 °C |
| Storage temperature (1 month) | −20 to +35 °C |
| Storage temperature (6 months) | −20 to +30 °C |
| Humidity (extreme low / high) | 15% / 90% |
| Atmospheric pressure (extreme low / high) | 700 hPa / 1060 hPa |
PPG / ECG measurement specifications
| PPG function | Continuous heart rhythm and atrial fibrillation monitoring |
| ECG features | 6-lead Electrocardiogram |
| ECG electrode locations | Bottom surface · Top surface · Wrist strap |
| ECG electrodes | Lead I and Lead III directly measured; Lead II, aVL, aVR, aVF calculated |
| AFib method | Non-invasive — PPG (Bio-optical sensing) + 6-lead ECG |
| Heart rate range | 40–200 BPM |
| Heart rate accuracy | ±5 BPM |