My friend has a truck with an aftermarket alarm setup. He has it so you can of course, lock it, unlock it, and it will do those cool chirps. But, he also has this button in his truck that if you push the button he can make it have the sound of the chirp but it will sound like a siren, almost like a cop siren sound. He said if he holds down the button a long time it will start to make the sound of an ambulance or something. Now, it doesn't have the tone of a cop and ambulance car, the tone is like the alarm. Has anybody heard of an alarm system that can do this? Has it been modded? He is wanting to sell his truck for 4k, and once he sells it I told him I'd buy the alarm and uninstall the stuff. Won't be for a while though so I want to find out info about this alarm now. He did not install this set up. He also has no idea of brand and model. Please help me guys/girls

 

i would just figure out what he has and buy it new