【Large AMOLED Display】Featuring a stunning 1.75-inch AMOLED screen with 466x466 resolution, the HK75 smartwatch offers crystal-clear visuals and vibrant colors for an immersive user experience. 【Comprehensive Health Monitoring】Track your well-being with advanced sensors for heart rate, blood oxygen, blood pressure, sleep patterns, and sedentary reminders, ensuring you stay on top of your health goals. 【Bluetooth-compatible Calling & Voice Control】Stay connected with Bluetooth-compatible 5.3 for hands-free calling and utilize voice commands for effortless control of your smartwatch functions. 【NFC & Mobile Payments】Enjoy the convenience of contactless payments with built-in NFC technology, supporting Alipay and other payment methods for quick transactions on the go. 【Long-lasting Battery Life】With a 300mAh lithium polymer battery, experience up to 7-10 days of regular use or an impressive 40 days on standby, minimizing the need for frequent charging. 【Customizable Experience】Access a wide range of watch faces, sports modes, and apps through FitCloudPro, allowing you to personalize your smartwatch to fit your lifestyle and preferences. 【Waterproof Design】Built to withstand daily wear and workouts, the HK75 features a waterproof design for worry-free use in various environments. Specifications: Display: 1.75" AMOLED touchscreen, 466x466 resolution Chipset: BLUETRUM AB5691G Memory: RAM 380KB, ROM 128Mb Compatibility: Android 4.4+ and iOS 10.0+ Bluetooth-compatible: Version 5.3 Sensors: G-Sensor (STK8321-w), Heart Rate (HX3918) Battery: 300mAh Lithium polymer Charging: Magnetic charging, 2 hours charging time Battery Life: 7-10 days of use, 40 days standby Water Resistance: Yes Supported Languages: 40+ languages including English, Chinese, Spanish, etc. App: FitCloudPro