Model Number: CJB100R/CJB150R/CJB200R1/CJB300R1 Brand Name: Senken Key Specifications/Special Features: Rated power: 100, 150, 200, 300and 400W optionsWorking voltage: 12or24VDCCan be matched with remote controller KZQ01 or KZQ02 (as shown in picture)Mixed tone function is available for 150,200, 300and 400W versions to enable a sound effect of a whole police motorcade by only one sirenRadio input and microphone volume control available by optional wiring on the panel of the main frame