... . OEM/ODM service 3. 1 year warranty alarm 4. CE certificate security emergency alarm Model:HHS-2100Voltage: 12VPower : 100-300wImpedance: ... Typically for polic car ,emergency ,rescue and project use .It has different tone for security, fire fighting, rescuing, engineering, ... of the main engine is elegant, steady, classical and decent, and can be freely chosen according to different powers, the ...