Sonic Resonator

Sonic Resonator is a Back Bling in Fortnite: Battle Royale, that can be purchased in the Item Shop with the Marcus Fenix Outfit for  1,500 V-Bucks or with the Kait & Marcus Bundle for  2,000 V-Bucks. It was first released in Chapter 3: Season 1 and is part of the Delta-One Set.

Trivia

 * Sonic Resonator's ID is BID_917_RustyBoltMale_1DGTV.
 * The Sonic Resonator is a device created by the Coalition of Ordered Governments (COG) to map the underground tunnels of Sera in Gears of War 3.

Gallery
Risonatore sonico