What's Included In The Box?The Garmin Forerunner 645 with Black Colored Band ships with the following items included:Forerunner 645 GPS WatchCharging CableDocumentationManufacturer DescriptionGPS Running Watch with Contactless Payments and Wrist-based Heart RateGarmin Pay™ contactless payment solution¹ lets you make convenient payments with your watch, so you can leave your cash and cards at home (Coming Soon!)Provides advanced running dynamics², including ground contact time balance, stride length, vertical ratio and moreUses wrist-based heart rate³ to offer performance monitoring features, including evaluating your current training statusConnected features4 include smart notifications, automatic uploads to Garmin Connect™ and the ability for others to track your runs with the LiveTrack featureCustomize with free watch faces, apps and more from our Connect IQ™ storeBattery life5: up to 7 days in smartwatch mode; 12 hours in GPS mode Running is more than just exercise — it’s a performance. And Forerunner 645 has the tools to help you put on an outstanding show every time you lace up your shoes. Featuring contactless payments that let you buy what you need while on the go — plus advanced running dynamics and performance monitoring tools — this GPS running watch is the instrument you need to refine the performance. Paying Made Easy Always on the run? Feel free to leave your phone and wallet behind. Forerunner 645 features Garmin Pay contactless payment solution¹, which lets you pay for purchases with your watch. Use it just about anywhere you can tap your card to pay. A bottle of water here, a bite to eat there — just pay, and keep on moving. Tune up Your Training We’re making it easier to get the data you need to improve your form. Let Forerunner 645 measure crucial running metrics that you can use to analyze your performance. Biomechanical measurements², such as cadence, stride length, ground contact time and balance, vertical oscillation and vertical ratio, are 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 compact Running 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 will track your distance, pace, stroke count and more. Monitor Your Performance Just how effective is your current training plan? Forerunner 645 will help you monitor your training and recovery so you can better prepare for a race or training cycle. Training status is a 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 anaerobic training effect metric 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 overall training 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. More Ways to Customize Check out our Connect IQ store, where you can add personality to Forerunner 645 by downloading apps, widgets, watch faces and more. It’s easy and — even better — it’s free. New apps are added every day, so you can keep tabs on when your Uber is arriving, turn on your lights at home with the SmartThings app, and even use the AccuWeather MinuteCast app to find out when the rain will start. With the Face It™ watch face app, choose any image from your photo library, make some tweaks, and set it as your watch’s face. Stay Connected on the Run Forerunner 645 makes it easy to run without leaving important smart features behind. Once paired with your compatible smartphone, you’ll be able to receive and even respond6 to text messages and see social media updates, emails and more right on your wrist. Find your phone, access music controls, and let friends LiveTrack your runs. Share and Compete Syncing your activities to Garmin Connect is for more than just storing your data. Garmin Connect is a thriving online community where people on the go can connect and compete by joining challenges, encourage each other’s successes and even share their triumphs via social media. Garmin Connect is free and available on the web or on your smartphone with the Garmin Connect™ Mobile app. Train Your Way Your routine is anything but routine. Forerunner 645 lets you change things up with ease, thanks to built-in activity profiles for running (indoor/outdoor), cycling (indoor/outdoor), swimming (pool), elliptical, paddle sports, strength training and many more. Create your own custom workouts, and download for free from our Garmin Connect online fitness community. Then review your past efforts on the app, or share them with family and friends for added motivation. Love the Look Designed for runners, Forerunner 645 features a reliable five-button interface that lets you mark laps with a quick press. Feel free to take this watch outside in all kinds of weather. Not only is it safe for swimming and showering, its Garmin Chroma Display™ is easy to read — even in direct sunlight — and housed under chemically strengthened glass. When you want to change it up, swapping bands is fast and doesn’t require tools. And with up to 7 days of battery life in smartwatch mode and 12 hours in GPS mode, Forerunner 645 is the running partner that can keep up with you.FeaturesGeneral • Lens Material chemically strengthened glass • Bezel Material stainless steel • Quick Release Bands (20 mm, Industry standard) • Strap material silicone • Physical size 42.5 x 42.5 x 13.5 mm • Weight 41.8 g • Water rating 5 ATM • Display type sunlight-visible, transflective memory-in-pixel (MIP) • Display size 1.2" (30.4 mm) diameter • Display resolution 240 x 240 pixels • Color display • Battery life Smartwatch Mode Up to 7 days, GPS mode Up to 12 hours • Memory/History 200 hours of activity data Clock Features • Time/date • GPS Time Sync • Automatic daylight saving time • Alarm clock • Timer • Stopwatch • Sunrise/sunset times • Face It™ watch face creator Sensors • GPS • GLONASS • Garmin Elevate™ wrist heart rate monitor • Barometric altimeter • Compass • Gyroscope • Accelerometer • Thermometer Daily Smart Features • Connectivity Bluetooth®, ANT+®, Wi-Fi® • Connect IQ™ (downloadable watch faces, data fields, widgets and apps) • Text response/reject phone call with text (Android™ only) • Calendar • Weather • Controls smartphone music • Find My Phone • Find My Watch • VIRB® remote • Smartphone compatibility iPhone® and Android™ • Compatible with Garmin Connect™ Mobile • Garmin Pay™ Activity Tracking Features • Step counter • Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it) • Auto goal (learns your activity level and assigns a daily step goal) • Sleep monitoring (monitors total sleep and periods of movement or restful sleep) • Calories burned • Floors climbed • Distance traveled • Intensity minutes • TrueUp™ • Move IQ™ • Fitness Age (in app) Fitness Equipment/Gym • Preloaded gym activity profiles Strength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing and Yoga • Cardio workouts • Strength workouts • Automatic rep counting Training, Planning and Analysis Features • GPS speed and distance • Customizable data pages • Customizable activity profiles • Auto Pause® • Interval training • Advanced workouts • Downloadable training plans • Auto Lap® • Manual lap • Virtual Partner • Configurable lap alerts • V02 max • Training Status (lets you see if you’re training effectively by tracking your training history and fitness level trend.) • Training Load (your total training load for the last 7 days calculated from estimated EPOC) • Training Effect (aerobic) • Training Effect (anaerobic) • Customizable alerts • Audio prompts • Finish time • Race an Activity • Course guidance • Segments (Live, Garmin) • Strava features (Beacon, live segments) • LiveTrack • Touch and/or button lock • Auto scroll • Activity history on watch Heart Rate Features • HR zones • HR alerts • HR calories • % HR max • % HRR • Recovery time • Auto max HR • HR Broadcast (broadcasts HR data over ANT+™ to paired devices) Running Features • Preloaded run profiles Running, Treadmill Running, Indoor Track • GPS-based distance, time and pace • Running dynamics • Ground contact time and balance (shows how much time, in the running motion, your foot is on the ground rather than in flight and lets you check your running symmetry) (Charging/data cable) • Stride length (real time) (Charging/data cable) • Cadence (provides real-time number of steps per minute) • Performance condition (after running 6–20 minutes, compares your real-time condition to your average fitness level) • Lactate threshold (through analysis of your pace and heart rate, estimates the point where your muscles start to rapidly fatigue) (Charging/data cable) • Run workouts • Race predictor • Foot pod capable Outdoor Recreation Features • Preloaded outdoor recreation profiles Skiing, Snowboarding, XC Skiing, Stand up Paddleboarding, Rowing • Point-to-point navigation • Bread crumb trail in real time • Back to start • TracBack® • UltraTrac mode • Elevation profile • Distance to destination • Vertical speed • Total ascent/descent • GPS coordinates Cycling Features • Preloaded cycling profiles Biking, Indoor Biking • Courses • Race an activity • Time/distance alerts (triggers alarm when you reach goal) • Compatible with Varia Vision™ (head-mounted display) • Compatible with Varia™ radar (rear-facing radar) • Compatible with Varia™ lights • Speed and cadence sensor support (with sensor) (ANT+® and Bluetooth® Smart) Swimming Features • Preloaded swim profiles Pool Swimming • Pool swim metrics (lengths, distance, pace, stroke count/rate, calories) • Stroke type detection (freestyle, backstroke, breaststroke, butterfly) • Swim efficiency (SWOLF) • Drill logging • Pool swim workouts