- Safe: Alert pedestrians and runners without startling them so you can stay on pace and avoid collisions Loud, Resonant Tone: Nickel silver bell and brass hammer cuts through ambient noise Lightweight & Comfortable: Includes 4 silicone inserts for a snug, custom fit Premium Materials: Stainless steel body, nickel silver bell and brass hammer Easy to Use, No Charging: Spring-loaded action makes it simple to ring Made in Japan: High-quality craftsmanship from Japan