Pick up the pace with the Garmin Forerunner 645 Music Running GPS Watch which tracks every element of your run while keeping you going, storing up to 500 songs, and featuring contactless payments.

Music Player

Music is one of the greatest motivators in any form of workout. The Forerunner 645 therefore helps streamline your devices further and includes a system that will let you store and play up to 500 songs via connecting the watch to a pair of Bluetooth wireless headphones. You can then use the watch to control your music while you’re on the move.

Heart Rate Monitor

The Forerunner 645 comes with a heart rate monitor fully integrated into the watches wrist at the back of the watch face. This is much more practical than using chest or shoulder strap with additional sensors. The Forerunner instead allows you to see your heart rate in real time all day, every day. Your heart will give you key information into your training – allowing you to ascertain whether your current training is effective, or if you’re not pushing it hard enough, or you’re overreaching.

Performance Monitoring

The watch uses GPS to provide highly accurate monitoring of all your activity. The device comes with Training Status which is a new performance indicator that automatically evaluates your recent exercise history which will let you know if your training is productive, peaking or overreaching. The Training Load mode will take this one step further in evaluating your exercise volume from the last 7 days.

Connectivity

Using Bluetooth Smart of Ant+ you can easily connect the Forerunner 645 to your smartphone or tablet device. This allows you to access the Garmin Connect mobile app which will help you keep track of your activity over days, weeks, months and years so that you can see your progress over time and really get your teeth into the details. The app also lets you make use of Garmin’s online community of other activity track users. Once connected you can also receive your smartphone’s notifications to your watch screen including text messages, call alerts, social media notifications and more.

Garmin Pay

The Forerunner 645 comes with Garmin’s new Garmin Pay which allows you to make card payments via the watch using contactless. This makes your running trip even easier – you no longer have to carry your phone, or wallet which streamlines your running kit making your running experience easier than ever.

Specifications

General
Lens Material: Corning Gorilla Glass 3
Bezel Material: Stainless steel
Strap Material: Silicone
Physical Dimensions: 42.5mm x 42.5mm x 13.5mm
Wrist Fit: 127-204mm
Colour Display
Display Size: 1.2’’ (30.4mm) diameter
Display Resolution: 240 x 240 pixels
Display Type: Sunlight-visible, transflective memory-in-pixel (MIP)
Weight: 42.2g
Battery Life: 7 days (Smartwatch Mode), 14 hours (GPS Mode without Music), 5 hours (GPS Mode with Music)
Water Rating: 5ATM
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

Sensors
GPS
Glonass
Galileo
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
Plays and Controls Watch Music
Music Storage (up to 500 songs)
Find My Phone
Find My Watch
VIRB Camera Remote
Smartphone Compatibility (iPhone and Android)
Compatible with Garmin Connect Mobile
Garmin Pay

Safety and Tracking Features
LiveTrack
Incidence Detection During Select Activities (Smartphone Required)

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 Travelled
Intensity Minutes
TrueUp
Move IQ
Fitness Age (in App)
All-Day Stress Tracking

Fitness Equipment/Gym
Available 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
Customisable Screen(s)
Customisable Activity Profiles
Auto Pause
Interval Training
Advanced Workouts
Downloadable Training Plans
Auto Lap
Manual Lap
Configurable Lap Alerts
VO2 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)
Customisable Alerts
Audio Prompts
Finish Time
Virtual Partner
Race an Activity
Course Guidance
Garmin Live Segments
Strava Live Segments
Touch and/or Button Lock
Auto Scroll
Activity History on Watch
Physio TrueUp

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
Available Run Profiles: Running, Treadmill Running, Indoor Track, Trail Running.
GPS-Based Distance, Time and Pace
Running Dynamics – when used with a compatible sensor (not included)
Vertical Oscillation and Ratio (The degree of ‘bounce’ in your running motion and the cost-benefit ratio with stride length) – when used with a compatible sensor (not included)
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) – when used with a compatible sensor (not included)
Stride Length (Real time) – when used with a compatible sensor (not included)
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 Pad Capable

Outdoor Recreation Features
Available Outdoor Recreation Profiles: Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing
Point-to-Point Navigation
Breadcrumb Trail in Real Time
Back to Start
TrackBack
UltraTrac Mode
Elevation Profile
Distance to Destination
Vertical Speed
Total Ascent/Descent
GPS Coordinates

Cycling Features
Alerts (Triggers alarm when you reach your goals including time, distance, heart rate or calories)
Courses
Available Cycling Profiles: Biking, Indoor Biking
Race an Activity
Compatible with Varia Vision (Head-mounted display)
Compatible with Varia Radar (rear-facing radar)
Compatible with Varia Lights

Swimming Features
Available Swim Profiles: Pool swimming
Pool Swim Metrics (Lengths, distance pace, stroke count, swim efficiency (SWOLF), calories)
Stroke Type Detection (Freestyle, backstroke, breathstroke, butterfly) (Pool swim only)
Drill Logging (Pool swim only)
Basic Rest Timer (Up from 0) (Pool swim only)
‘Repeat On’ Rest Time
Countdown Start
Pool Swim Workouts

In the Box 

Forerunner 645
Charging Cable
Documentation

Compatibility

Adapters
AC Adapter Cable, Europe

Batteries
Garmin Charge Power Pack

Bands
Quick Release Band

Cases and Covers
Carrying Case

Heart Rate Monitors
HRM-Dual
HRM-Run

Cycling Accessories
Wristwatch Bike/Trolley Mount
Bike Cadence Sensor Bands

Sensors
Running Dynamics Pod
Tempe
Speed Sensor 2
Cadence Sensor 2
Bike Speed Sensor 2 and Cadence Sensor 2 Bundle 

About the Garmin brand

Garmin International Inc. manufactures and markets navigation and communications equipment for the aviation and consumer markets such as the popular Garmin Edge mountain bike and road bike GPS range. Garmin products serve aviation, marine, automotive, wireless, OEM, and general recreation applications.

Specifically Garmin aim to enrich the lives of customers, suppliers, distributors, and employees by providing the very best products that offer superior quality, safety, and operational features at affordable prices. What started out in 1989 with a handful of dedicated engineers and a great idea for a product has grown into the Global Positioning System (GPS) leader–both in sales and critical acclaim. Garmin has helped to take GPS to new heights by going beyond the ordinary features and performance found in typical GPS receivers.

Today, Garmin has a diverse product line and distributors in virtually every part of the world. While garmin's immediate success has resulted from developing innovative products for a variety of markets, their long-term success is based on commitment to support customers after the sale. They are winning over new customers with quality products, tremendous value, and superior service, and are working to turn them into loyal Garmin supporters for many years to come.