Hand Crank Siren Horn 110db Metal Emergency Can also be worn with

Can also be worn with girlfriends

can be attached to any position such as wall mirrors

compact and lightweight

- Be visible to boats

Hand Crank Siren Horn 110db Metal Emergency Can also be worn withHand Crank Siren Horn 110db Metal Emergency It is used for emergency warning and easy to carry. Can be used for factories, families, schools, flood control, disaster relief,public and industrial occasions. Timely warning, reduce the loss of people 's property and casualties. By manually rotating the handle, the gearbox of the transmission step by step acceleration to achieve the purpose of sound, the sound depends on the rotation speed of the handle.