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Fox 40 Micro Whistle vs SPOT Gen4

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

Fox 40 Micro Whistle is the lighter option — 139 g lighter than the SPOT Gen4 (93% less weight). If grams matter to you, that is the one to beat.
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Spec Fox 40 Micro Whistle SPOT Gen4
Weight 10 g · 0.010 kg · 0.02 lb 149 g · 0.149 kg · 0.33 lb
Brand Fox 40 SPOT
Category Safety Safety
Fox 40 Micro Whistle
10 g

Pealess safety whistle audible up to 1km.

Full details →
SPOT Gen4
149 g

One-way satellite tracker with SOS capability.

Full details →

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Fox 40 Micro Whistle vs SPOT Gen4: which should you buy?

If saving weight is your priority, the Fox 40 Micro Whistle wins — at 10 g it is 139 g (93%) lighter than the SPOT Gen4 (149 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 safety page, or browse the full gear weight database.

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