Bluetooth Smart Technologywirelessly Sends Heart Rate Data Directly To Bluetooth Device for Use With Downloadable Fitness Apps To Training To The Next Level displays Time & Tracks Heart Rate Average Speed Distance Steps Taken Lap Speeds & Calorie Consumption Provides Instant & Accurate Heart Rate Monitoring Levels recall Mode Stores Data For Up To 10 Workouts & 100 Lap Records Sync Workout Mode Transfers Workout Data To Smartphone Timer Mode Count Down Timer Workout Mode Measures Distance Traveled Compatible With Iphone & Ipad Pink