AMK S.O.L. Fox 40 Sharx Whistle Spanto Uses one 18650 rechargeable Li-ion

Uses one 18650 rechargeable Li-ion battery or two CR123Abatteries

quick filter integrity check can confirm proper filter performance

RUNTIME: 17 hours

ultra-clear tempered glass lens with anti-reflective coating

AMK S.O.L. Fox 40 Sharx Whistle Spanto Uses one 18650 rechargeable Li-ionThe SHARX features a four resonator body that emits an unbelievably powerful 120db dual frequency signal. A true outdoor whistle, the ABS plastic body is co molded with rubber inserts for grip and comfort during use. SOL Survive Outdoors Longer SHARX Whistle: Be heard, 120dB signal is audible for miles Fail safe, pea less design works in all conditions won't freeze or stick to lips when cold Intense howl, 4 resotor body with dual frequency tone