Commax 1 to 1 door phone system. DP-2S Specs: Power source: AC 110V 50/60Hz; Wiring - Call: 2 wires, Door Release: 2 wires (1.6Ø Copper wire); Mount type:Surface-mounted type; Distance of connection between doorphone and doorbell: 100m(0.65Ø) 50m(0.8Ø); Dimensions (in): 4.25"(W)× 8.3"(H) × 1.3" (2.4")(D) DR-2GN Specifications: Power source: 9V (from monitor); Mount type: surface-mounted type; Dimensions (in): 93.5 (W) x 126 (H) x 18(D)

• Package includes one doorphone DP-2S and one doorbell DR-2GN.
• Easy installation with only 2-wires
• DP-2S doorphone to talk with visitor and release door (electric strike not included)
• DR-2GN door unit to make house call and talk (doorbell is not waterproof)

Package includes one doorphone DP-2S and one doorbell DR-2GN.Commax