TPE Fitness Tracker for Women with Blood Pressure, 0.98inch IPS HD Full-Touch Colorful Screen with Optical Heart Rate Sensor, Smart Fitness Soft Silicone Bracelet with Step Counter, Calorie【Convenient to Charger】: This one built Plug-in USB Charging, you just pull out the watchband, and then charge head plug-in computer, notebook through USB charging. If you don't understand, you can reference the..