Please note: ANDROID System can support all function in the description. For iPhone: There is no app for iPhone because IOS didn't open it. So below four functions can't sync with iPhone,But all other function can use normally because no need to use app. 1. Anti-lost 2. Messaging 3. Notifier 4. Remote Camera User manual: Only support 2G network Micro SIM card [GSM/GPRS 850/900/1800/1900] * Music player;Twitter; Image; browsing; whatsapp; Facebook; Internet; these functions must be configured before you can use TF memory card. * Twitter; whatsapp; Facebook; Internet, Need to insert SIM card and TF memory card, and the SIM card needs to open GPRS,Download to use. * Internet only supports GPRS,does not support WIFI Common problem: How to achieve Bluetooth message notification? Please scan the two-dimensional code in the watch to download Bluetooth notification software, Bluetooth connection phone, open the notification option. Check if the battery is inflated. As a result of long-term transport, will lead to battery power depletion, so please remove the battery, friction electrode, install the battery, charging. Check if the battery is inflated. Features: It supports built-in SIM and TF card sort function; dial,phone book, call history ,message etc. It supports pedometer : activity tracing,sedentary remind and sleep monitoring function. Multifunctional for it supports anti-lost, pedometer, sleep monitor, sedentary reminder and etc. The camera with video recorder,you can take picture as you want,picture shows PNG, JPG Super comfortable to wear it on. Description: Whether it is a present for yourself, or a gift for a friend or relative, you won't be disappointed. Fashionable watch design. A smart watch bluetooth wristwatch for many kinds of smartphone Specifications: Model:GT08 Dial Size:48mm*41mm Dial Thickness:12mm Watch total length: 215mm Dial Thickness:12mm Strap Width:25mm Color:black/red-golden/black-golden/silver CPU:For MTK6260A Storage :128M+64M up to 32GB TF card Screen :1.54 inch TFT LCD touch screen Resolution :240*240 pixel Touch Screen :OGS touch screen Bluetooth :Ver 3.0 Camera :2.0 M Battery type :Lithium-ion polymer battery (built in) Battery capacity :3.7V/350mAh Package Package Package Included::: 1 X Unisex Smart Watch Note: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. The color of the actual items may slightly vary from the above images due to different computer screen, thanks for your understanding.bove images due to different computer screen, thanks for your understanding.