SPECIFICATIONS:  Dimensions:   4.5" (11.43 cm) W x 4.5" (11.43 cm) H x 2.0"
(5.08 cm) D.  Weight: .7 lb. (.32 kg).  

VANDAL-RESISTANT DOOR ENTRY SPEAKER WITH CALL BUTTON
S-571

• Heavy duty steel pushbutton

• Internal louvered speaker grille

• 45 ohm speaker

• Faceplate constructed from 11AWG steel

• Mounts in a 2-gang 4" x 4" electrical box

SPECIFICATIONS:  Dimensions:   4.5" (11.43 cm) W x 4.5" (11.43 cm) H x 2.0"
(5.08 cm) D.  Weight: 1.60 lb. (.68 kg).