Garmin Forerunner 305 vs Garmin Forerunner 405

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Forerunner 305 compared with Forerunner 405

	GarminForerunner 305	GarminForerunner 405
Overview
Released
Released	2006	April 2008
Display
Case sizes
Case sizes	53.3 mm	48 mm
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	Backlit 33 × 20.3 mm monochrome display, 160 × 100 pixels; configurable training screens and physical buttons. Panel technology is not specified by Garmin.	Backlit monochrome screen, 1.06-inch diagonal and 124 × 95 pixels; a touch-sensitive bezel and two buttons control the watch. Panel technology is unpublished in the maker's specification.
Health and fitness
ECG
ECG	No	No
Blood oxygen
Blood oxygen	No	No
Skin temperature
Skin temperature	No	No
Sleep apnoea alerts
Sleep apnoea alerts	No	No
High blood pressure alerts
High blood pressure alerts	No	No
Body composition
Body composition	No	No
Fall detection
Fall detection	No	No
Crash detection
Crash detection	No	No
GPS
GPS	Single-band	Single-band
Sensors
Sensors	High-sensitivity SiRFstarIII GPS receiver, included wireless heart-rate chest strap and optional GSC 10 cycling speed/cadence sensor; no optical wrist sensor.	High-sensitivity GPS receiver; optional ANT+ heart-rate chest strap, foot pod and cycling speed/cadence sensor. No optical wrist sensor.
Fitness features
Fitness features	Running, cycling and other-sport profiles; quick, interval and advanced workouts, course racing, Virtual Partner, Auto Pause, Auto Lap and heart-rate, pace, time and distance alerts.	Pace, distance, time, calories, custom and interval workouts, Virtual Partner, Auto Lap and Auto Pause.
Safety features
Safety features	Stores 100 locations and 50 routes; basic route display, direction to a stored location and navigation back to the start. No base maps.	Stores up to 100 locations and provides direction to a saved location; no base maps.
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 10 hours	Up to 8 hours
In low-power mode
In low-power mode	–	Up to 14 days
Mobile data option
Mobile data option	No	No
Works with
Works with	No phone pairing	No phone pairing
Battery life detail
Battery life detail	Internal rechargeable lithium-ion battery; ten hours of typical use.	Rechargeable lithium-ion battery; approximately eight hours with GPS or two weeks in power-save mode.
Charging
Charging	Docking cradle with AC charger and USB cable.	Contact charging clip and AC adapter.
Connectivity
Connectivity	USB computer transfer through the cradle; Garmin Training Center software and MotionBased analysis were supplied at launch. Wireless heart-rate and cycling sensor connections; no direct phone pairing.	ANT+ Sport wireless data transfer to a computer through a USB ANT stick; Garmin Connect and Garmin Training Center analysis. No direct phone pairing.
Storage
Storage	Up to 1,000 laps; smart recording or one-second recording.	Around 1,000 lap records; Garmin Taiwan quotes approximately twenty hours of track points at one point every four seconds.
Design
Weight (lightest version)
Weight (lightest version)	77 g	60 g (better)
Software
Software	Garmin	Garmin
Case materials
Case materials	IPX7 immersion protection, one metre for thirty minutes; the owner's manual says it is not intended for swimming.	IPX7 immersion protection, one metre for thirty minutes; not intended for swimming.
Size
Size	53.3 × 68.6 × 17.8 mm and 77 g. Width is used as the case size.	48 × 71 × 16 mm; approximately 60 g. Width is used as the case size; the English manual instead lists 47.75 × 70.5 × 16.4 mm.
Bands
Bands	Vinyl wrist strap with an expander strap; fabric strap available separately.	–
In the box
In the box	Watch, heart-rate chest strap, wrist and expander straps, docking cradle, AC charger, USB cable, Garmin Training Center software and documentation.	Watch, USB ANT stick, AC charger and manual; heart-rate strap included in some bundles.