'Device 3' is a headlamp developed and optimized for huge caves by Tobias Bossert and Gottfried Buchegger; they handcrafted ten samples for the local caving clubs only. In Germany and Austria this lamp is known as 'Tobi 3'. This is a derivative of 'Device 3', which already was tested in both comparisons in 2009. 'Device 3a' never was offered commercially and will not be manufactured again. But improved/simplified derivatives are under development now.
Three variants of 'Device 3a'
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