GT21 1.75 inch HD Screen Smart Watch Bluetooth-compatible Call IP67 Waterproof Sports Bracelet GPS Fitness Tracker with Heart Rate Blood Oxygen ECG Monitoring - Black

• HD Large Screen: 1.75-inch high-resolution display, wide color gamut, clear picture quality; 6mm ultra-thin Thin middle frame, with 25D radian mineral glass cover, bring you extraordinary wear experience
• Sitting Calmly, More Than One Side: Dual UI theme interaction and diversified dials, not repeated, more versatile. The wrists are varied, giving you a different freshness every day
• Smart Reminder for Convenient Life: Wechat, QQ, Twitter, Facebook, and other social news push is synchronized with mobile phone in real-time, intelligent vibration reminder, avoid missing important news, convenient and fast
• HD Bluetooth-compatible Calling: You can answer or make calls on the watch, communicate anytime, anywhere, and experience the convenient life brought by smart wear
• Science Movement: The intelligent exercise algorithm records the number of exercise steps, calories, heart rate, and other dates for you to help you formulate a training plan that is more suitable for you
• Heart Rate Monitoring: Using PPG optical heart rate detection technology, bath resting heart rate and exercise heart rate can be accurately measured to protect your physical and mental health
• IP67 Professional Waterproof: Professional waterproof and dust-proof design, easy to deal with daily waterproof, no fear of daily life scenarios, such as washing hands and raining

Specifications:

• CPU: GR5515
• Built-in storage: RAM256KB+ROM1024KB
• External flash: 64Mb
• Display: 1.75-inch full circle full-color full viewing angle TFT
• Resolution: 240*283
• Touch Screen: Capacitive Full Touch
• Bluetooth-compatible: BT5.1 and BT3.0
• Heart rate sensor: support
• Battery: 180mAh polymer lithium-ion battery
• Bluetooth-compatible connection standby: about 30 days
• Normal use: 5~7 days
• Pedometer: support
• Motor: support
• Microphone: support
• Speaker: support
• Button: Power button
• Charging method: charging base DC5V--150mA
• Dustproof and waterproof grade: IP67
• Static protection level: contact 4KV, air 8KV