Features: 1.Waterproof: you are not afraid of water when you wear it in daily life, 2.Scientific records and analysis of sleep status: The built-in chip algorithm detects the number of deep sleep, light sleep and wakefulness, analyzes the quality of sleep, and improves sleep more easily 3.Bluetooth compatible high-definition call: connect the mobile phone, the smart watch can answer, when the mobile phone has an incoming call, SMS reminder, the smart watch has corresponding reminders, you can view important information by raising your hand 4.True heart rate sensor: Optical heart rate sensor, real-time monitoring of heart rate during exercise to protect your heart health 5.High-definition full-screen color touch: 1.75-inch screen, so that every bright screen is stunning Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Description: Product name: smart bracelet Case: zinc alloy Strap: TPU Screen size: 1.75 inches Battery capacity: 150 mA