Note: 1. This is the Eurasian version of the 4G smart watch, which supports 4G networks in Asia and Europe, the vast majority of telecommunication providers in the United States, Canada, Mexico and other country regions only support 3G networks. 2.This is an Android watch that does not need to be connected to a mobile phone APP. You only need to insert a SIM card or connect to WIFI to use it as an Android phone. 3.SIM Card Slot: Inserting the sim card while the watch is on may cause the watch to not work properly.Make sure the watch is off before inserting the sim card. 4.It just support life waterproof,you can't put it into the water. Product Features: CPU: SL8541E Cortex-A53 Quad-Cord CPU Flash Memory: RAM(2GB/4GB)+ROM(16GB/64GB) ddr3 Display: 2.13 inch AMOLED rectangle screen, DPI:410*502 Touch Screen: Capacitive touch screen, touch IC: CST820, G+F structure Heart Rate Sensor: support\HX3918,High precision support for functions such as dynamic heart rate, true blood oxygen, HRV, heart rate optical live body recognition, etc Camera: Support Pedometer: support/triaxial accelerometer RF Frequency Bands: GSM: B3+B5+B8 WCDMA: B1+B5+B8 LTE-FDD: B1/B3/B5/B7/B8/B20 LTE-TDD: B38+B39+B40+B41(100M) WIFI: Support\2.4GHz, Support 802.11b/g/n BT: Support V4.2 BLE Shell Materials: Zinc alloy Bottom Shell: PC+double-shot molding craft Strap Materials: replaceable straps/Silicon Colour: black Battery: 950mAh large capacity polymer battery Button: Two keys,One Power key,One Back Key Charging: Magnetic charging SIM Type Support: Nano SIM card,to be inserted from watches' side Speaker: 0615 Speaker Mic: Support Motor: Support\0720 motor OS: Android 8.1 Language: Amharic (Ethiopia), Arabic (Egypt), Arabic (Israel), Bulgarian (Bulgaria), Bengali (Bangladesh), Catalan (Spain), Czech (Czech Republic), Danish (Denmark), German (Germany), Greek (Greece), English (Australia), English (Canada), English (United Kingdom), English (Ireland), English (India), English (New Zealand), English (Singapore), English (United States), English (South Africa) , Spanish (Spain), Spanish (United States), Basque (Spain), Persian (Iran), Finnish (Finland), French (France), Gujarati (India), Hindi (India), Croatian (Croatia), Hungarian (Hungary), Indonesian (Indonesia), Italian (Italy), Hebrew (Israel), Japanese (Japan), Khmer (Cambodia), Kannada (India), Korean (Korea), Kashmiri (India), Lao (Laos), Lithuanian (Lithuania), Latvian (Latvia), Malayalam (India), Marathi (India), Malay (Malaysia), Burmese (Myanmar), Norwegian Bokml (Norway), Nepali (Nepal), Dutch (Netherlands),Olomo (Ethiopia), Oriya (India), Punjabi (India), Polish (Poland), Portuguese (Brazil), Portuguese (Portugal), Romanian (Romania), Russian (Russian), Sanskrit (India), Sindhi (India), Sinhala (Sri Lanka), Slovak (Slovakia), Slovenian (Slovenia), Somali (Somalia), Serbian (Serbia), Swedish (Sweden), Kiswahili (Tanzania), Tamil (India), Telugu (India), Thai (Thailand), Tigrinya (Ethiopia), Turkish (Turkish), Ukrainian (Ukraine), Urdu (Pakistan), Vietnamese (Vietnam), Chinese (China), Chinese (Hong Kong), Chinese (Taiwan) Packing details Product Size (mm) Body 49.1+44.2+14.6MM Long strap: 126MM, Short strap: 80MM Watch Weight(g): 57g