Nano SIM Card Support: Enjoy the ultimate without taking your phone, whether you're traveling or outdoors, your watch keeps you connected. 2 Working Modes: Insert SIM card then it can work as a real smart phone, or download "Wi 2" APP and connect this smart watch to your smart phone via BT. Face Unlock: Support face unlock, protect your privacy. Dual Camera and Video Recording: 2.0MP front camera and 5.0MP side camera, clear and free shooting and video recording, and you can easily view photos and videos in a smart watch. Call, message and notification reminder: check contacts, make calls, receive/reject incoming calls, receive messages and APP notifications. Display Screen: 1.39 inch AMOLED Touch Screen: Full Round Full Touch Resolution: 400*400 RAM/ROM: 3G+32G SIM Card: Nano SIM Internet: 2G/3G/4G System: Android 7.1 Frequency Band: Quad - GSM band, Quad-band WCDMA, TDS-SCDMA (B34/B39), FDD LTE: 1/2/3/5/7/8/20 TDD LTE: 38/39/40/41 Camera: 200W 500W interpolation; two cameras Bluetooth: 4.0 Heart rate sensor: HS3300 battery: 830mAh Horn: 0615 wifi: 2.4/5Ghz GPS: GPS+Glonass Bluetooth effective distance: > 10 meters (open environment) Battery life: about 3 days charging method: Pogo Pin Charging time: 1 hour Watch case: ceramic bezel + PC button: Aolly Strap material: TPU Head size: 49*49*16.5mm Strap size: 24mm Product features: support support manual language selection on Watch, Contacts, Phone, Messaging, Browser, Calendar, Clock, Camera, Music, Sound Recorder, Weather, Voice Search, Face ID, Video Call, Play Store, Maps, App Store, pedometer, heart rate, multi-sport mode, phone search, dial selection, stopwatch, music control, raise your hand Screen, remote camera, WeChat, QQ, Twitter, Facebook, Whatsapp, Skype and other app downloads app third-party ications, phone SMS notification Support system: Compatible with IOS 8.0, Android 4.4 and above system versions Support language: Simplified Chinese, Traditional Chinese, English, German, Russian, Spanish, Portuguese, French, Japanese, Italian, Polish, Vietnamese, Dutch, Czech, Danish, Hungarian, Swedish, Vietnamese, Slovak Norwegian, etc. Full time display: 1) Date, week, clock, minute (real time display); 2) Time system: 12/24 hour dual system; 4) After the mobile phone Bluetooth APP is connected, the watch will automatically read the time, date, format and synchronization of the mobile phone. Walking motion monitoring: 1) Accurately monitor walking (steps), physical energy consumption (calories), walking distance (km); 2) 24-hour full-time monitoring. Information: After connecting with the mobile phone Bluetooth APP, the watch will vibrate in time to remind you of incoming calls, text messages, QQ, WeChat, Twitter, Facebook, Whatsapp, Skype and other information. Remote photo: After connecting to the mobile phone Bluetooth APP, turn on the mobile phone camera from the APP, and shaking the camera at this time can be used as the phone shutter to achieve a photograph from a distance.