Vktech&reg; OLED Bluetooth 2.1 Smart Watch Pedometer Step Walking Distance Calorie Counter Sport Activity Tracker for Android Smart wrist watch with LED screen, clearly showing the steps, time, sleep quality and calorie-burning result Search for "Wristband APP" in APP store to download APP procedure of healthy bracelet and install it into your Android smartphones Syncs your data to Android smartphones for record keeping, Light weight and comfortable silicone wrist band Special features: Double bright screen, Pedometer, Distance course, Stopwatch, Date, Stopwatch, Sleep monitoring, Calorie burns, Week The dial diameter: 2.0 cm / 0.8 inch, Product size: 24.7 x 2.0 x 1.3 cm (L x W x H)