Horn of metal exactly as the gas ... but pumped up with the supplied pump again! Always willing to signal.
-Environmentally friendly.
-Low cost.
-Pump included.
-About 20 signaling per charge.
-115dB.
-You do not have to buy refill tubes for all time and is friendly to the environment simultaneously.
-Hand-tone horn, perfect for various industries, trainwarnings and to all sporting events such as football, hockey, handball, etc.