Promate XWatch-B19.Black ActivLife™ Smartwatch with Hands-Free Function

The XWatch-B19 also features a heart rate sensor, pedometer sensor, blood oxygen level sensor, and sleep tracker to help you live a healthier life. Bluetooth Profiles:BR/EDR Bluetooth Frequency:2402-2480MHz Chipset:RTL8762DK BK3266 Input Rating:3.7V/1A Screen Size:1.91″ ROM:64MB