Quantity 2 piece(s) Material Plastic + steel Color White + blue Type Electronic Device Function Air horn for DIY project Intercom Function No Interface Cable Power Supply 12V Working Current 5A Other Features Red cable connect with power +; Black cable connect with power -; Blue cable connect with the button of the horn; Long service lifetime; Perfect sound quality; Multiple sound choice for you; With sound memory function never change to default after power off; Easy installation Packing List 2 x Horns (20cm cable) 1 x Cable connector (20cm-cable) 2 x Mounting plates 2 x Screws