IQ America Portable Strobe Light Wireless Door Chime Portable, wireless door chime with strobe light function. Chime receiver can be moved around easily to avoid missing visitors. Ideal for the hearing impaired. Can be set to alert with just the chime, with just the strobe light, or both. Features 4 sound options 2-note, wind chimes, clarinet, and saxophone. Strobe function can also be used to avoid waking sleeping children or those who work nights and need to sleep during the day. Signal passes through walls, floors, and doors. Self-programmable codes prevent interference from neighboring systems. Includes portable strobe/chime box and transmitter push button. Strobe unit requires 3 AA batteries, not included. Push-button requires 1 CR2032 lithium battery, included. 3.5 inches wide x 4.75 inches high x 2.5 inches deep. Weighs 0.44 pounds. 2 year warranty. Style Battery Operated, Range 200 Ft., Batteries Required 3 AA Alkaline 1 CR2032 Lithium, Color Off-White, Pkg Qty 1, Package Type Clamshell