... ODM service 3. 1 year warranty alarm 4. CE certificate security emergency alarm Model:HHS-2100Voltage: 12VPower : 100-300wImpedance: ... ,emergency ,rescue and project use .It has different tone for security, fire fighting, rescuing, engineering, clearing the way, protocol, ... the controller from the mail engine, which facilitates the installation.We offer various kinds of Sirens, which are suitable ...