1、Used as a stand-alone phone. If y​ou install a GSM SIM card into your smart watch, you can make calls directly with your smart watch, including answering and dialing. If you don't have a SIM card installed, you can connect to your phone via the Bluetooth 2、Mobile phone function. Single SIM card (micro SIM card) can be used as mobile phones to support calls via Bluetooth or smart watches; GSM/GPRS 850/900/1800/1900 (2G, not support CDMA); phone, mobile phone, call log, phone book; Bluetooth phone. 3、Synchronization function. For Whatsapp/Twitter/Facebook/browser (need to place 2G / 5G network SIM card); time, schedule, read text messages; sports health: pedometer, sleep monitoring, sedentary reminder. Other features: image viewer, recorder (need t 4、Wide compatibility. This smart watch supports most for Android and for IOS phones. Such as for iPhone 7/7 plus, for iPhone 6/6 plus, for iPhone 6s / 6s plus, for iPhone 5 / 5s, for iPhone SE (only part of the features are supported), for Samsung GalaxyS8 5、HD display. This Bluetooth smart watch features a 56-inch touchscreen display with a 0.3MP camera and resolution of 240x240 pixels. Features: 1. Used as a stand-alone phone. If you install a GSM SIM card into your smart watch, you can make calls directly with your smart watch, including answering and dialing. If you don't have a SIM card installed, you can connect to your phone via the Bluetooth and make a call. But please note that it only supports part of the features for iPhone. 2. Mobile phone function. Single SIM card (micro SIM card) can be used as mobile phones to support calls via Bluetooth or smart watches; GSM/GPRS 850/900/1800/1900 (2G, not support CDMA); phone, mobile phone, call log, phone book; Bluetooth phone. 3. Synchronization function. For Whatsapp/Twitter/Facebook/browser (need to place 2G / 2.5G network SIM card); time, schedule, read text messages; sports health: pedometer, sleep monitoring, sedentary reminder. Other features: image viewer, recorder (need to be placed and memory card), remote shooting, alarm clock, calendar, camera ( 0.3M), two-way anti-lost. 4. Wide compatibility. This smart watch supports most for Android and for IOS phones. Such as for iPhone 7/7 plus, for iPhone 6/6 plus, for iPhone 6s / 6s plus, for iPhone 5 / 5s, for iPhone SE (only part of the features are supported), for Samsung GalaxyS8/S8 plus/S7/Note 5, for Google Pixel/Pixel XL, for HTC/Sony/LG/HUAWEI/ZTE/OPPO/XIAOMI and other smart phones. 5. HD display. This Bluetooth smart watch features a 1.56-inch touchscreen display with a 0.3MP camera and resolution of 240x240 pixels. Specification: CPU: MTK6261-D RAM/ROM: MTK6260(Built-in)-64+32M Memory Card: Support TF Card (MAX 32GB) 2G GSM 850/900/1800/1900MHz Camera: 0.3 MP Screen Size: 1.54inch/ 1.52inch LCD Resolution: 240x240 pixels Touch Screen: Capacitive touch screen Entertainment: Support microphones, pedometers, cameras, preventing lost Added Features: Phone book, call reminder Push function: For WeChat, message, etc. Bluetooth: BT Ver 3.0 Phone Call supports 2G network I/O Micro USB Interface, USB headset, TF card slot, SIM card slot Adapter: DC5V/2A (Micro USB Port) Battery Capacity: 3.7V/380mAh Li-ion Battery Standby Time: 4.5 days Material: Zinc alloy+PU Product Size: Approx. 55x40x13mm/ 2.2x 1.6x 0.5inch Color: Gold, Silver, Black, White (optional) Package List: 1 x Smart Watch   1 x User Manual   1 x Data Cable