ER2230W 30W Shoulder Megaphone with Detachable Mic 800mThe ER 2230W is a shoulder megaphone having facilities of EXT. mic input, an AUX input, a DC power input, a battery meter whistle sound. It can be mounted to the optional ST 16A speaker stand. The newly developed polyimide diaphragm is employed to ensure high sound quality. Product Features Detachable Hand held Microphone with volume control and On Off switch Whistle function Power Output: 30W Rated 45W Max. 10 D batteries (17 hrs) Battery Life