1、Dual system smart watch heart rate monitor. 2、Adopt MTK6739+NRF52840 dual chips for powerful performance. 3、Built-in 600mAh battery with 2-day standby time in 4G mode. 4、Support system for Android 7.1.1. 5、Excellent quality and durability. Features: 1. Dual system smart watch heart rate monitor. 2. Adopt MTK6739+NRF52840 dual chips for powerful performance. 3. Built-in 600mAh battery with 2-day standby time in 4G mode. 4. Support system for Android 7.1.1. 5. Excellent quality and durability. Specifications: < Dual chip: MTK6739+NRF52840 Main memory: DDR3 1GB, EMMC: 16GB SIM card: Standby, hands-free calling, Nano SIM Supported frequency bands: GSM 850 / 900 / 1800 / 1900 WCDMA B1/2/5 TD-SCDMA B34/B39 LTE-FDD:B1/B2/B3/B5/B7/B12/B20 LTE-TDD: B38/B39/B40/B41 Touch Screen: for AMOLED 1.39in full round screen, dual interface, screen resolution: 454*454 Camera: HD, 5 million pixels For Bluetooth Support WIFI: Support GPS: Support Heart Rate Support Step Counter Support Data Interface POGO PIN Battery 600mAh Standby Time 4G mode standby 2 days, bracelet mode standby 5 days Phone Call Time About 3 hours Software Operating System for Android 7.1.1 Menu Phone Book, phone, information, settings, browser, download, calendar, clock, camera, gallery, music, recorder, file management, heart rate monitoring, sports, Weather, voice search, Play Store, Maps, Mobile Assistant, Operation Guide, APP Market, Microsoft Translate, Bracelet Mode Bracelet Mode Click on the bracelet mode to enter the bracelet interface, display the dial interface, the step counter interface, the heart rate interface, and the notification interface. Setting Sound, display, main menu style, connection, gestures, power save mode, language input method, date and time, reset device, uninstall application, about watch Sport Outdoor running, outdoor walking, indoor running, cycling, ball, skipping Weather Local weather (under SIM card network) Connection For Bluetooth, WLAN, WLAN hotspot, flight mode, GPS, mobile network Mobile Phone Assistant Connect your phone, take a photo remotely, listen to music, send files, find your phone Gesture Raise your hand to brighten the screen, step counter starts at boost Language Chinese (Simplified), Chinese (Traditional), Chinese (Hong Kong), Japanese, Korean, English, French, Russian, German, Dutch, Portuguese, Arabic, Persian, Brazil, Portugal, Malaysia, Italy, Turkey, Thailand, Vietnam, India, Indonesia, Greece, Spain, Czech Republic and other languages (optional) In-air Upgrade Support Dial In addition to the optional dial in the watch, you can also customize the dial (the last one) or add the server inner dial via the network. Mobile Phone Assistant Phone for Android Support for the original operating system for 6.0 and above, (Settings - About devices, view for Android version) Phone for Iphone Support for system versions for 11.1 and above. Can be set by phone - General - About this machine, check the version, if the version is lower than system for 11.1, please upgrade first. Package List: 1 * Watch 1 * USB Cable 1 * Disassembly tool 1 * Charging base 1 * User manual 1 * Operation guide