Green Lion Tech Master Smart Watch-the perfect combination of technology and style. The screen size of the display is 1.43 inches with a crisp resolution of 466×466. Besides providing vivid visuals, the watch gives one an extra smooth touch experience. The 400mAh lithium polymer battery supports a long working time, about 3-5 days, and up to 10 days on standby. This watch is powered by 128MB RAM and 1GB ROM, thus providing efficient running along with Bluetooth 3.0 + BLE 5.3 connectivity for smooth pairing. It features Bluetooth calling, message notifications, and NFC. With IP67 water resistance, this smartwatch ensures durability when performing various activities on a daily basis. Fitness and wellness is its objective since it comes with various sports modes, blood oxygen monitoring, and heart rate tracking. This also supports the navigation built into it, thereby adding convenience for active users. Compatible with Android 5.0 and iOS 9.0 or higher, the Green Lion Tech Master Smart Watch is a reliable companion in modern lifestyles. Specification Screen Size: 1.43" AMOLED Screen Resolution: 466×466 (AMOLED) Battery Capacity: 400mAh Lithium Polymer RAM: 128MB ROM: 128MB + 1GB Watch Case: Aluminum Bluetooth: BT 3.0 + BLE 5.3 Charging Time: 2-3 Hours Working Time: 3-5 Days Standby Time: 8-10 Days Water Resistance Level: IP67 System Compatibility: Android 5.0 and iOS 9.0 or Above SKU: GNTEMSTSWBK | GNTEMSTSWSL GTIN: 0990478120600 | 0990478120617 Features Bluetooth Call Sports Mode Navigation Support Message Notification NFC Support Blood Oxygen Heart Rate