I4 Air 3G Smartwatch Phone 1.39 inch Android 5.1 MTK6580M 1.0 G Hz Quad Core 2GB RAM 16GB ROM 2.0MP Camera Bluetooth 4.0 Heart Rate Monitor Parameters: Display: 1.39 inch touch screen CPU: MTK6580M 1.0 G Hz Quad Core System: Android 5.1 RAM+ROM: 2GB RAM + 16GB ROM Bluetooth: 4.0 SIM type: single nano SIM Functions: GPS, Heart Rate Monitor, Pedometer, Message, Music, Weather, Clock, Browser Network: -GSM: 850/900/1800/1900 M Hz -WCDMA: 850/2100 M Hz Camera: 2 Megapixel HD Bluetooth: BT 4.0 WIFI: 802.11b/g/n GPS: Yes Data Interface: POGO PIN Battery Capacity: 400m Ah Menu: Contacts, Phone, Messaging, Setting, Remote, Brower, Calendar, Clock, Camera, Gallery, Music, Remote Co, Sound, Files, Find me, Health, Weather, Voice, Play store, Maps Health: Heart rate monitor, Pedometer Tools: Browse Music, Alarm, Sound record Weather: Local weather (with SIM card network) OTA Upgrade: Yes Watch Face: you can download more from the service (when it's connected to network) APK besides the faces existed in the watch Android Users: Support original version 4.4 or higher (Set-about-check the Android version) for iPhone Users: Support 9.0 or the higher version (Setting-general-about to check, for the version below 9.0, please upgrade to 9.0 or higher).