SOUND & VISUAL INDICATOR ALERT SYSTEM: Extra loud doorbell system with flashing strobe visual indicator. Easily adjustable volume control on chime receiver. The kit is equipped with a bright strobe light that comes connected and is visible in dim or bright light. Our strobe can be mounted on most any surface and additional wire can be added to increase the distance between the chime receiver and the strobe light as needed. TRANSMITTER & PUSH BUTTON DOORBELL: With adjustable volume control and 12 different tunes. Ideal use in the large homes, industrial, Business facilities & commercial buildings POWERFUL & WIDE RANGE CAPABILITY: Heavy-duty wireless doorbell signal penetrates walls and fencing. Can transmits up to 2500 feet - Even transmits through multiple building walls including reinforced concrete as well as separate buildings. Transmits through metal, reinforced concrete, stone, brick, wood - even multiple floors, unattached structures and buildings. SIMPLE INSTLATION: Simply plug in the chime receiver to an ordinary electrical outlet and pair the doorbell button with the chime receiver. Place the wireless doorbell at any entry door or waiting room. INCLUDES: One (1) wireless electronic chime with built-in volume control, One (1) low-voltage flashing strobe light wired to the chime with 5′ of wire, One (1) wireless electronic doorbell button transmitter. The push button utilizes a CR-2, 3 volt lithium ion battery (battery included)., Manufacturer: Milton Industries, Inc.