• Round 1.46" display with 360 × 360 pixel resolution.
• Multi-System GPS for positioning and outdoor activities.
• Bluetooth calls directly from the smartwatch.
• Bluetooth 5.3.
• VC9213A heart rate sensor.
• 6-axis motion sensor.
• More than 100 sports modes.
• Professional training evaluation system.
• Sleep monitoring.
• Heart rate monitoring.
• 500mAh battery.
• 2 ATM water resistance.
• Compatible with the DaFit app.

iSEN C31 features a round 1.46" TFT display designed to clearly show activity information, notifications, calls and sports data.

• Display size: 1.46".
• Type: TFT.
• Shape: Round.
• Color: Gray.
• Built-in watch faces: 5.
• Additional watch face: 1 push watch face through the app.

• Chipset: JL AC7074A7S.
• Memory: 128MB.
• App: DaFit.
• Interface dedicated to sports functions, calls and daily monitoring.

Multi-System satellite positioning is designed for faster location detection and tracking of outdoor activities.

• Multi-System GPS: Yes.
• Positioning for compatible outdoor activities.
• Route and sports activity tracking through compatible functions.
• Data can be synchronized with the DaFit app.

The Bluetooth Call function allows you to make and answer calls directly from your wrist when the watch is connected to a compatible smartphone.

• Bluetooth: 5.3.
• Bluetooth Call: Yes.
• Answer calls directly from the smartwatch.
• Make calls through the connection with a compatible phone.

iSEN C31 uses a dedicated sensor for heart rate monitoring and tracking values associated with daily and sports activities.

• Heart rate sensor: VC9213A / VP60A5.
• Optical system with 5 PD for heart rate monitoring.
• Continuous monitoring compatible with the watch functions.
• Data available for activity and workout analysis.

The 6-axis sensor contributes to more precise motion detection and sports activity tracking.

• G-Sensor: STMicroelectronics.
• Type: 6-axis.
• Improved motion detection.
• Contributes to activity and exercise analysis.

More than 100 sports modes allow the monitoring of a wide range of activities, while the training evaluation system provides useful information about performance and recovery.

• Sports modes: more than 100.
• Professional Training Evaluation System: Yes.
• Sports activity monitoring.
• Data analysis for performance and recovery.
• Synchronization through the DaFit app.

The sleep monitoring function tracks rest-related data to provide a clearer overview of sleep routines.

• Sleep duration monitoring.
• Analysis of sleep stages and sleep quality through compatible functions.
• Synchronization of information with the DaFit app.

The 500mAh battery provides generous capacity for the smartwatch's monitoring, GPS and Bluetooth calling functions.

• Battery capacity: 500mAh.
• Battery life may vary depending on GPS use, Bluetooth calls, screen brightness and active monitoring.

The 2 ATM water resistance rating provides protection for everyday use, workouts, rain and splashes, within the limits specified by the manufacturer.

• Water resistance: 2 ATM.
• Suitable for everyday use and regular sports activities.

• Multi-System GPS.
• Bluetooth 5.3 calls.
• Heart rate monitoring.
• Sleep monitoring.
• 6-axis motion sensor.
• More than 100 sports modes.
• Professional training evaluation system.
• 5 built-in watch faces.
• 1 additional watch face through the app.
• Synchronization with DaFit.

• 1.46" round TFT display.
• 360 × 360 pixel resolution.
• Multi-System GPS.
• Bluetooth 5.3 Call.
• JL AC7074A7S chip.
• 128MB memory.
• VC9213A heart rate sensor.
• 6-axis G-Sensor.
• 100+ sports modes.
• Training Evaluation System.
• 500mAh battery.
• 2 ATM water resistance.
• DaFit app.

• Built-in GPS for outdoor activities.
• Round display with good resolution.
• Bluetooth calls.
• Heart rate monitoring with a dedicated sensor.
• 6-axis motion sensor.
• More than 100 sports modes.
• Workout and recovery evaluation.
• Sleep monitoring.
• 500mAh battery.
• 2 ATM water resistance.
• DaFit app.

The exact dimensions and weight of the iSEN C31 are not specified in the provided information.

• 1 × iSEN C31 GPS Smartwatch.
• 1 × Charging cable.
• 1 × User manual.