Spec：

• ● Power Source：DC 12V
• ● Contact：4 set COM、NC、NO contact
• ● Material ：A B S plastic
• ● Dimension：95mm ×62mm ×29mm

Function：

• ● 1.The main function is shifted image signal & talking with receive & calling with room station.
• ● 2.The automatic switch has a 14pin socket and connecting wire.
• ● 3.The automatic switch only suit for door phone and calling room units use (max.4units)