IQ America Step-Up Satin Nickel Wireless Door Chime Wireless, battery operated door chime. Includes 1 chime box and 1 push-button. Chime melodies include Westminster 8-note, 2-note, and 1-note. Different melodies can be selected for front or back door and volume is adjustable. An extra push-button can easily added, sold separately. Features self-programming to ensure no interaction from neighboring systems. Chime box requires 3 C batteries not included, and push button requires 1 CR2032 lithium battery included. 5.75 inches wide x 8.5 inches high x 0.75 inches deep. Weighs 0.95 pounds. 5 year warranty. Style Battery Operated, Range 200 Ft., Batteries Required 3 C Alkaline 1 CR2032 Lithium, Color Satin Nickel, Pkg Qty 1, Package Type Clamshell