Skechers SK-21 Type: Heart Rate Monitor Color: White Features: All day Activity Tracker- Displays all day Steps, Distance, Calorie Count with 12 day memory. Activity Status review with single RGB LED indicator Sleep Monitor- Monitors sleep patterns Bluetooth low energy wireless transmission technology . Connects to iphone 4s, 5, iPad, iPad mini. Tracks steps, distance and calories to the IOS mobile devices The first Activity Band to distinguish between walking and running Specification: Skechers GOwalk Sleep/Activity Monitor SK-24 Personal Health Monitors Bluetooth iOS