Fitness smartband Gravity GT40-1 — black, activity tracker with heart rate monitoring

Gravity GT40-1 is a compact black fitness smartband designed to monitor daily activity and basic health metrics. The device tracks steps, estimated distance and calories, and provides continuous or periodic heart rate monitoring. Intended for everyday wear, the tracker also supports sleep monitoring and delivers notifications from a paired smartphone, offering straightforward insights into activity patterns and wellbeing.

Advantages

The Gravity smartband combines a slim, lightweight design with essential activity-tracking functions and heart rate monitoring in a single wearable. Its form factor makes it comfortable for all-day use, while the clear pairing with a smartphone enables call and message notifications. The device provides simple data points—steps, calories, distance, heart rate and sleep metrics—that are easy to read and interpret for routine health tracking.

Suitable for

• Everyday activity tracking for users who want basic step and calorie counts
• Fitness sessions such as walking, jogging and light workouts
• Sleep monitoring to assess rest duration and basic sleep patterns
• Users who want heart rate monitoring during daily activities
• People seeking a discreet wearable for smartphone notifications

Key specifications

• Form factor: compact wrist-worn smartband in black
• Activity tracking: step counter, distance estimation, calorie estimation
• Heart rate: continuous or periodic heart rate monitoring
• Sleep: basic sleep tracking (duration and sleep phase estimation)
• Connectivity: pairs with smartphone for notifications and data sync
• Display and controls: simple screen and touch or button control for basic interactions
• Battery and usage: designed for multi-day use on a single charge (actual duration varies with usage)

How to use

Wear the Gravity GT40-1 snugly on the wrist with the sensor side against the skin to ensure accurate heart rate and activity readings. Install the companion app on a compatible smartphone, pair the device via Bluetooth, and allow required permissions for notifications and health data. Use the band during daily activities and sleep; sync regularly with the app to review tracked steps, distance, calorie estimates, heart rate trends and sleep summaries. Charge the device when the battery level is low following the manufacturer’s charging method.

Usage recommendations

For best results, wear the band during both daytime activities and sleep, keep the sensor area clean and dry, and ensure a secure but comfortable fit. Regularly sync with the smartphone app to keep activity and health records up to date. Note that measurements are intended for general wellness insights and are not a substitute for professional medical devices or advice.