Product Name: Audio Door Phone for Apartment (Button-Press Type)Model Number: MY-H&MY-H1/MY-H2Place of Origin: ChinaSpecifications: 1) Door station can communicate with indoor phone 2) Direct-press type, convenient for operation 3) Uses durable stainless steel panel 4) With standby power supply 5) With remote unlocking function, Ding-Dong ring 6) Convenient for installation, uses 4-core wire + user wire 7) Dimensions: a) Door station MY-H: 265 x 120 x 45mm b) Indoor phone MY-H1: 190 x 85 x 55mm