Garmin Forerunner 165

Works with: iPhone and Android
Display: AMOLED, 1.2 in
Case sizes: 43 mm
Battery: 11 days
GPS battery: 19 hours
Water resistance: 5 ATM
Weight: 39 g

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Garmin Forerunner 165 at a glance

Battery

Around two weeks

Up to 11 days in smartwatch mode. 19 hours with GPS.
GPS

Built-in GPS

No maps. Runs and rides without your phone.
Display

AMOLED, 1.2 in

1.2 in, always-on option and touchscreen.
Health

Heart, sleep and more

Measures blood oxygen and HRV.
Phone & smart

iPhone and Android

Payments.
Build

5 ATM water rating

39 g.

Garmin Forerunner 165 full specifications

Overview

Brand	Garmin
Model	Forerunner 165
Series	Forerunner

Platform & apps

Works with iPhone and Android phones, running Garmin.

It has an app store for extra apps and watch faces.

Operating system	Garmin
Works with	iPhone and Android
Storage	4 GB
App store	Yes

Display

A bright, colourful screen that looks like a phone display.

1.2 in, always-on option and touchscreen.

Display type	AMOLED
Screen size	1.2 in
Resolution	390 x 390
Pixel density	325 ppi
Colour display	Yes
Always-on display	Yes
Touchscreen	Yes
Controls	touchscreen

Design & durability

A 43 mm case weighing 39 g.

Rated 5 ATM: fine for swimming laps and showers.

Case sizes	43 mm
Case shape	Round
Dimensions	43 x 43 x 11.6 mm
Thickness	11.6 mm
Weight (case)	39 g
Bezel material	fiber-reinforced polymer
Lens	chemically strengthened glass
Band material	silicone
Band width	20 mm
Band fitting	20 mm
Fits wrists	126-203 mm
Water resistance	5 ATM

Battery

Around two weeks: up to 11 days in smartwatch mode.

With GPS on, up to 19 hours. Makers test with their own settings, so treat these as best-case figures.

Battery (smartwatch mode)	11 days
Battery (GPS)	19 hours
All battery modes	Smartwatch: 11 days; Battery saver: 20 days; GPS: 19 hours; All satellite systems: 17 hours
Battery type	Lithium ion
Charging	proprietary-plug

GPS & navigation

Built-in GPS, so you can record runs and rides without your phone.

Navigation shows a breadcrumb trail, not a full map.

GPS	Built-in
Satellite systems	GPS, GLONASS, Galileo
Maps	Breadcrumb trail
Navigation features	point-to-point navigation, bread crumb trail, back-to-start, TracBack, course guidance

Health & sensors

Tracks heart rate around the clock, plus blood oxygen and HRV.

For sleep, it offers a nightly sleep score.

Sensors	optical HR, SpO2, accelerometer, barometer, compass, thermometer, ambient light
Heart-rate sensor	Garmin Elevate
Heart-rate tracking	24/7
High/low heart-rate alerts	Yes
Heart-rate variability	Yes
Blood oxygen (SpO2)	Yes
Respiration rate	Yes
Sleep tracking	Sleep score
Stress tracking	Yes
Energy score	Body Battery
Cycle tracking	Yes

Safety

Has an emergency SOS feature.

SOS works through your paired phone. Live tracking lets friends follow your workouts.

Emergency SOS	Via phone
Incident detection	Yes
Live tracking	Yes

Training

Built for training, with the metrics serious athletes use.

It adds running power and daily suggested workouts.

Auto activity detection	Yes
Swim tracking	Pool and open water
Underwater heart rate	Yes
Training metrics	VO2 max, training effect, recovery time, race predictor, HRV status
Adaptive coaching	Yes
Running dynamics	Yes
Wrist running power	Yes
Strength rep counting	Yes
Heart-rate broadcast	Yes
External sensors	ANT+, foot pod, speed/cadence, bike radar/lights

Smart features

Smart extras include contactless payments.

Notifications	Yes
Message replies	Android
Contactless payments	Yes
Payment service	Garmin Pay
Find my phone	Yes
Find my watch	Yes

Specs compiled from Garmin's product pages and datasheets. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.