Hand Crank Siren Horn Manual Operated Metal Alarm Handheld Air Rai...

Hand Crank Siren Horn Manual Operated Metal Alarm Handheld Air Raid Siren Portable Loud Manual Siren Emergency Safety (Green)

• 1. The siren with manual operation is used for emergency warning and easy to carry.
• 2. Handheld alarm siren is used for factories, families, schools, flood control, disaster relief,public and industrial occasions.
• 3. 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.
• 4. It is made of durable aluminium alloy that ia more sturdy and wear resistant.
• 5. This hand alarm can be warning timely to reduce the loss of people 's property and casualties.