Single Chamber. Measures approximately 2" long x 1/4" wide. Weighs only 4.7 grams (approximately .16 ounce). Maximum sound intensity of 120 decibels. Constructed from a piece of polished TC4 titanium alloy. Lanyard hole. Utilizes a precision Teflon resonator. Lightweight, sturdy, and durable. Perfect for outdoor events, sporting events, security and law enforcement. Works in wet or dry conditions. Boxed with hanging tab.