Features:

• Be Heard- 110dB signal is audible over 1 mile.
• Fail-safe - Pea-less design works in all conditions - won't freeze or stick to lips when cold.
• Take it Everywhere - Ultra-portable design weighs only a few grams and fits in any pocket - or attach it to a zipper pull.

Specifications:

• Size:.875" x 2.25" x .3125"
• Weight:.2 oz. ea.