GPS Running Watch with Music, Contact-less Payments and Wrist-based Heart Rate

Choose the 645 Music and store up to 500 songs on your watch so you can listen to your favorite tunes without needing your phone
Garmin Pay contact-less payment solution lets you make convenient payments with your watch, so you can leave your cash and cards at home (Coming Soon!)
Provides advanced running dynamics, including ground contact time balance, stride length, vertical ratio and more
Uses wrist-based heart rate to offer performance monitoring features, including evaluating your current training status
Connected features include smart notifications, automatic uploads to Garmin Connect and the ability for others to track your runs with the LiveTrack feature
Customize with free watch faces, apps and more from our Connect IQ store
Battery life: up to 7 days in smartwatch mode; 12 hours in GPS mode

Running is more than just exercise — it’s a performance. And Forerunner 645/645 Music, has the tools to help you put on an outstanding show every time you lace up your shoes. 500 of your favorite songs on your wrist and also featuring contact-less 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.

Music While You Play

Choose the Music version of the 645 and link to your iTunes or other music sources and select up to 500 songs to download to your watch. Pair up your Bluetooth headset and you are set to rock and roll !. Playlists, Albums, whatever!...

Paying Made Easy

Always on the run? Feel free to leave your phone and wallet behind. Forerunner 645 features Garmin Pay contactless payment solution, 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.

(p.s. be aware in HK Garmin Pay is still going through approval processes .. keep checking the banks approval list on the Garmin website for progress)

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 measurements, 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 respond 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.

Infographic: Garmin Forerunner 645 Music Product Review

Infographic: Garmin Forerunner 645 Music's New Features

Infographic: Garmin Forerunner 645 Music Feature Highlights

Infographic: Garmin Forerunner 645 Music Fitness Training Features & Metrics

Infographic: Garmin Forerunner 645 Music Features for Outdoor Recreation & Navigation

Specification

General
Lens Material	chemically strengthened glass
Bezel Material	stainless steel
Quick Release Bands	yes (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	Yes
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)
Smart notifications
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

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
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
GPS-based distance, time and pace
Running dynamics
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)
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