The Z52 Pro smart watch has a large 1.92 inch touch screen so that calls can be made easily from this watch. This smart watch mainly features split screen display, bluetooth call, heart rate and blood pressure monitoring. The watch has a 280mAh lithium-ion polymer battery that can be charged wirelessly and takes 150 minutes to fully charge. Call option function Working time 8 days sleep monitor Notices Calls, Emails, SMS, WhatsApp, WeChat Wireless charging system Alloy vacuum coating case 45mm silicone strap