ES7200C2-SPK0031 is a one-channel 100 watt electronic siren model, it matches with a 100W stainless steel speaker and dual remotes.It adopts the technologies of wireless voice, wireless data and PLL frequency stabilization, etc. and breaks off from the traditional binding connection limit for the sirens. The wireless remote control distance is above 10 meters and it comes with backlight on the remote. Equiped with two auxiliary light terminals on the main siren box, it can run two-channel 12V Led Lights and is with simple one button light control on the remote.You can use the PA system by pressing and holding the button on the side of the remote and speaking towards the microphone sound pickup hole. The attached steering wheel mounted remote offers a quick siren operation while driving. It has more than 20 warning tones to fit for Police, Ambulance, Fire, Breacher, Engineer and some other Special Operation Vehicles and occasions. With simple installation, convenient operation and stable performance, this siren could be a good choice for those vehicles and ocassions that have the demands for PA system and/or audio warning.