smart watch GT4 with Bluetooth calling function (answer/make calls), fitness tracking watch with sleep monitoring function, suitable for iPhone/Android, IP68 waterproof (black)

【APP:FitCloudPro】 [Main control chip CPU: Zhongke Lanxun BT8959T5] [Compatible systems: Android 5.0 and above; iOS 10.0 and above] [Flash memory: 892KB: RISC-V - 364KB HIFI 4 -528KB] [Screen type: AMOLED] [Screen size: 1.43 inches] [Resolution: 466*466] [Touch screen IC/type: CST820] [Connection parameters: Bluetooth call Zhongke Lanxun BT8959T5] 【Bluetooth: BLE5.3】 [WIFI: None] [NFC: Yes] [Sensor: Acceleration sensor gsensors STK8321] [ECG: None] [Heart rate: LC09A] [GPS: None] [Body temperature: None] [Battery: polymer lithium battery] [Capacity: 3.7V/330mAh-602223)] [Charging method: wireless charging] [APP software functions: exercise, step counting, calories, distance, exercise mode, health, blood pressure, heart rate, blood oxygen, sedentary reminder, sleep monitoring, automatic heart rate monitoring, etc.] [Smart reminder: incoming calls, text messages, emails, WeChat, QQ, Facebook, Twitter, WhatsApp, LinkedIn, Instagram, Messenger, Snapchat, Line, Kakao Talk, Viber, Skype, telegram] [Others: raise your wrist to light up the screen, alarm clock reminder, remote control photo taking, search for mobile phone, etc.] [Watch hardware functions: exercise data distance, calories, steps, real-time heart rate, exercise duration] [Sports mode selection: walking, running, mountain climbing, cycling, rope skipping, basketball, badminton, football, yoga +1 is used as a push sports mode] [Others: OTA, shortcut bar (control center), data (step counting, distance, calories), heart rate, blood pressure, blood oxygen, sleep, raise your wrist to light up the screen, weather, WeChat exercise, information, reminders (messages, drinking water, Sedentary, alarm clock), women's health, stopwatch, countdown, find phone, find bracelet, shake to take photo, dial switching, music control, settings (language selection, brightness adjustment, screen on duration, vibration setting, factory reset, version Information), power on and off logo, components (function editing), password lock, breathing training, exercise, exercise history, do not disturb mode, power saving mode, low battery reminder, voice assistant (SIRI), call function, frequently used contacts, Phone dial pad, split screen (sidebar), flashlight, payment code, scan code connection, business card (to make friends), calculator, engineering test mode & shipping mode, calendar, Alipay payment. 】 [Waterproof level: IP68] [Charging time: 4H] [Battery life: 7 days] [Standby power consumption: minimum 70uA] [Charger specifications: DC 5V] [Firmware languages: Chinese, English, German, Russian, Spanish, Portuguese, French, Japanese, Italian, Polish, factory default English] [APP languages: English, Chinese Simplified, Chinese Traditional, German, French, Arabic, Czech, Greek, Spanish, Japanese, Persian, Italian, Korean, Dutch, Polish, Portuguese, Russian, Finnish English, Swedish, Thai, Hungarian, Slovak, Croatian, Albanian, Turkish, Ukrainian, Hindi, Vietnamese]