Type : Portable Power Source : Battery Sound Level : 84 DB Wired/Wireless : Wireless Dimensions : 2.75 In H X 2.75 In W X 1.57 In D (Doorbell), 2.75 In H X 1.875 In W X 0.625 In D (Push Button) Mounting Type : Wall Includes : CR2032 Battery
Battery Type : Lithium-Ion Voltage Rating : 120 V Sensor Type : Ionization, Photoelectric Detection Method : Fire, Smoke Number Of Sensors : 2 Sound Level : 85 DB Operating Temperature : 40 To 100 Deg F Dimensions : 5 In L X 2 In W X 5 In H Includes : Mounting Bracket With Hardware And Battery
Wired/Wireless : Wired Lighted/Unlighted : Lighted Material : Plastic Color : Hammered Black Mounting Type : Recessed Dimensions : 3.63 In H X 1 In W X 1 In D Suitable For : 16 V Hard Wired Doorbell Systems
Type : Portable Power Source : Battery Sound Level : 90 DB Wired/Wireless : Wireless Dimensions : 8.5 In H X 5.91 In W X 2.76 In D (Doorbell), 2-3/4 In H X 1-7/8 In W X 5/8 In D (Push Button) Mounting Type : Wall Includes : CR2032 Battery