Designed with a 2.88-inch large and high-definition screen, sensitive touch, smooth operation experience, smoothly play the App you need Built-in SIM card slot, support full Netcom 4G network, allowing you to answer/make phone calls, and mobile phone can be online at any time Equipped with 2300mAh polymer lithium battery, coupled with a deeply optimized energy-saving system, one charge, longer working time Support 4G+ full Netcom and WiFi wireless fast Internet access, brings high-speed and stable network connection, and brings you a smoother operating experience and smoother video calls Intelligent heart rate algorithm, fast and accurate, monitors and reminds your heart rate anytime, anywhere, so that you can understand your physical condition and enjoy a healthier life Specification: Operating System Android 9.0 Dimension 77.2*53.6*15mm (strap size: 32*288mm) Weight 150g (with strap) Material Aluminum alloy body + silicone strap Color Grey, silver, rose gold Languages Multi-language Screen 2.88 inch IPS capacitive full touch screen, 640*480px Processor MT6761 Cortex-A53 quad-core, up to 2.0GHz;  GPU: PowerVR Rogue GE8300 RAM 4GB RAM ROM 64GB ROM, not support TF card extension Camera Double cameras: 5MP front + 13MP top camera Battery Built-in 2300mAh lithium polymer battery Sensors Pedometer sensor, gravity sensor, gyroscope, heart rate sensor Speaker Support Network Bands 2G: GSM 850/900/1800/1900MHz 3G: WCDMA 850/900/1900/2100MHz; TD-SCDMA B34/B39 4G: FDD-LTE B1/B2/B3/B5/B7/B8/B12/B17/B20; TDD-LTE: B38/B39/B40/B41 WiFi IEEE 802.11 a/b/g/n/ac, support 2.4GHz/5GHz dual-band WiFi Bluetooth-compatible Version V5.0 GNSS Support GPS/BDS/GLONASS/Galileo Video Call Support Sync with smartphones Support Android 6.0 or above Full Time Display Built-in various watch dial designs Health Management Monitor steps, heart rate, physical exertion, and walking distance, etc Package included:1 x Smart Watch1 x Magnetic Charging Cable1 x English and Chinese User Manual1 x Mini ScrewdriverOther things not included