TheGarmin Forerunner 645 Music GPS Watch is anactivity tracking watch purposefully built for runners that stores and plays up to 500 songs, allows you to make contactless card payments, and receives your smartphone notifications. Running is more than just exercise, it’s a performance. And Forerunner 645 Music has the tools to help you put on the perfect show every time you lace up your shoes. It features on-device music storage, so you can run with your favourite tunes. And contactless payments let you buy what you need without missing a beat. With all that plus advanced running dynamics and performance monitoring tools, this GPS running watch is the instrument you need perfect the act.We’re making it easier to get the data you need to improve your form. Let Forerunner 645 Music measure crucial running metrics that you can use to analyse your performance. Biomechanical measurements, such ascadence,stride length,ground contact time and balance,vertical oscillationandvertical ratioare the key to understanding your form so you can bring your best on race day. These metrics are available with the addition of a compatible heart rate strap or the compactRunning Dynamics Pod, which clips right onto your waistband. Also, take advantage of feature sets to help with cycling and even swim training. In the pool, Forerunner 645 Music will track your distance, pace, stroke count and more.Just how effective is your current training plan? Forerunner 645 Music will help you monitor your training and recovery so you can better prepare for a race or training cycle.Training statusis a new performance monitoring tool that automatically evaluates your recent exercise history and performance indicators to let you know if you’re training productively, peaking or overreaching. The newanaerobic training effectmetric opens a window of insight to a critical dimension of training, telling you how your training is improving your ability to push the limits. You can even view your overalltraining load, which measures your exercise volume from the last 7 days and compares it to the optimal range for your fitness and recent training history.Garmin Forerunner 645 Music GPS Watch FeaturesEasily download up to 500 songs to your watch, and connect with Bluetooth®headphones (sold separately) for phone-free listeningIncludes the Garmin Pay™Ready contactless payment method1that lets you make convenient payments with your watch, so you can leave your cash and cards at homeProvides advanced running dynamics including ground contact time balance, stride length, vertical ratio and moreUses wrist-based heart rate to offer performance monitoring features, including evaluating your current training statusBattery life: up to 7 days in smartwatch mode; 5 hours in GPS mode