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Black Diamond Recon BT Beacon vs Fox 40 Micro Whistle

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

Fox 40 Micro Whistle is the lighter option — 190 g lighter than the Black Diamond Recon BT Beacon (95% less weight). If grams matter to you, that is the one to beat.
Spec Black Diamond Recon BT Beacon Fox 40 Micro Whistle
Weight 200 g · 0.200 kg · 0.44 lb 10 g · 0.010 kg · 0.02 lb
Brand Black Diamond Fox 40
Category Safety Safety
Black Diamond Recon BT Beacon
200 g

Bluetooth-enabled avalanche beacon for backcountry travel.

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Fox 40 Micro Whistle
10 g

Pealess safety whistle audible up to 1km.

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Black Diamond Recon BT Beacon vs Fox 40 Micro Whistle: which should you buy?

If saving weight is your priority, the Fox 40 Micro Whistle wins — at 10 g it is 190 g (95%) lighter than the Black Diamond Recon BT Beacon (200 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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