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Casio Pro Trek PRG-340 vs Garmin inReach Messenger Plus

Weight and specs compared for 2026 — and which one to choose.

Casio Pro Trek PRG-340 is the lighter option — 50 g lighter than the Garmin inReach Messenger Plus (43% less weight). If grams matter to you, that is the one to beat.
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Spec Casio Pro Trek PRG-340 Garmin inReach Messenger Plus
Weight 66 g · 0.066 kg · 0.15 lb 116 g · 0.116 kg · 0.26 lb
Brand Casio Garmin
Category Electronics Electronics
Casio Pro Trek PRG-340
66 g

Solar-powered outdoor watch with triple sensor.

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Garmin inReach Messenger Plus
116 g

Compact satellite messenger with enhanced messaging features. Only 4.1 oz.

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Casio Pro Trek PRG-340 vs Garmin inReach Messenger Plus: which should you buy?

If saving weight is your priority, the Casio Pro Trek PRG-340 wins — at 66 g it is 50 g (43%) lighter than the Garmin inReach Messenger Plus (116 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest electronics page, or browse the full gear weight database.

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