WFY-MALL OLED Bluetooth 2.1 + EDR Smart Bracelet Sport Watch with Pedometer Sleep Monitoring Calorie-burning Counter for Android Smart Phones (Black) Dimensions: (9.45 x 0.79 x 0.59)" / (24 x 2 x 1.5)cm (L x W x H) Supports Android 4.3 below Silicone material, safe and comfortable to wear Syncs your data to Android smart phones for record keeping Smart wrist watch with screen, clearly shows the steps, time, sleep quality and calorie-burning result