Features: Support Nano SIM Card: Enjoy the ultimate freedom without taking your phone, whether you are travelling or going for outdoor activities, your watch keeps you connected. 2 Working Modes: Insert SIM card then it can work as a real smart phone, or download "HEBSWatch" APP and connect this smart watch to your smart phone via BT. Dual Camera and Video Recording: 5MP front camera and 13MP side camera, clear and free shooting and video recording, and you can conveniently view photos and videos in smart watch. Call, Message and Notification Reminder: Check contacts, make calls, receive/ reject incoming calls, receive messages, and notifications of APP, this watch will never let you miss any important thing. Heart Rate Monitoring: Monitoring your real-time heart rate and records historical data. This smart watch always cares for your health and let you understand your physical condition and enjoy a healthier life. Sports Watch: Built-in motion sensor to monitor your exercise status in real time, supports multiple sports, accurately records all-day activities like active time, steps, distance, calories burned and heart rate. Strong Battery Life: 2300mAh high-capacity battery to reduce the trouble of charging frequently. And with a magnetic USB charging cable, you can charge your watch anytime and anywhere. Life Waterproof: Suitable for daily life use such as washing face, washing hands, being caught in the rain, etc. Not for swimming and taking hot bath or hot sauna. Don't put it in hot water. Various dials: Various dials for option, supports static and dynamic dials, satisfies daily life, business, sports needs, applicable to various scenes. Hardware Configuration: CPU: MT6761 Watch APP: HEBSWatch Display screen: 2.88 inch TFT Screen Resolution: 480 x 640 dpi RAM/ROM: 4Gand64GB SIM card: Nano SIM (Not included) Internet: 2G/3G/4G System: Android 9.0 Frequency band: GSM:850/900/1800/1900 WCDMA: B1/B2/B5/B8 TD-SCDMA: B34/B39 LTE FDD: B1/B2/B3/B5/B7/B8/B12/B17/B20 LTE-TDD: B38/B39/B40/B41(100MHz) Camera: Front 5 million, Side 13 million Battery: 2300mAh Wifi:Support: 2.4G/5G Battery life: 3 days Support system: Android 6.0 or iOS 11.0 and above. Note: Android watch does not support Bluetooth calls. It needs SIM card to make phone calls. Specifications: Color: Black Watch Case: Aluminum Alloy Watch Band: Silicone Waterproof: Daily water resistance (not for showering and swimming, Don't put it in hot water). Dial Size: 77.253.615mm3.042.115.91in Watch Band Width: 32mm by 1.25in Perimeter: 275mm to 10.83in Watch Weight: 131g to 4.6oz Package List: 1.Smart Watch (SIM CARD NOT INCLUDED) 1.USB Magnetic Charging Cable User Manual