QS40 Bluetooth Calling Smartwatch, 1.39 inch, IP67, 5-7 Day Battery

The QS40 is a 57 g sports smartwatch with a 1.39-inch screen, Bluetooth 5.2 calling, sleep tracking and heart rate, SpO2, temperature and blood pressure estimates. It is IP67 rated with 5 to 7 days of battery.

Best for: A slim, stylish everyday watch.

Key features of the QS40 Bluetooth Calling Smartwatch

• 1.39-inch round screen
• Bluetooth calling
• Sleep and health tracking
• IP67 water resistance
• Battery life: 5–7 days

QS40 Bluetooth Calling Smartwatch specifications

Compatibility and setup

Pair it with the companion app on your iPhone or Android phone over Bluetooth (Bluetooth 5.2) to get notifications and sync your activity. Battery life: 5–7 days, depending on use. Heart rate, SpO2, blood pressure and sleep readings are estimates for general wellness, not medical measurements. Compatibility: iOS, Android. For more help choosing, read our smartwatch buying guide or smartwatch compatibility guide.

QS40 Bluetooth Calling Smartwatch FAQs

Does the QS40 Bluetooth Calling Smartwatch work with iPhone and Android?

Yes. It connects to iPhone and Android phones over Bluetooth (Bluetooth 5.2) using its companion app.

How long does the battery last?

Up to 5–7 days per charge. Real-world battery life depends on volume, settings and how you use it.